diff --git a/.gitignore b/.gitignore
index 81ca29f..6926acd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,7 +14,7 @@ day9.md
 day10.md
 01_02_03_days_backup.md
 test.md
-15_Day
+
 16_Day
 17_Day
 18_Day
@@ -30,4 +30,5 @@ test.md
 28_Day
 29_Day
 30_Day
-test.html
\ No newline at end of file
+test.html
+res.js
\ No newline at end of file
diff --git a/14_Day/14_day_error_handling.md b/14_Day/14_day_error_handling.md
index 3d40c67..f60da42 100644
--- a/14_Day/14_day_error_handling.md
+++ b/14_Day/14_day_error_handling.md
@@ -14,7 +14,7 @@
 
 </div>
 
-[<< Day 13](https://github.com/Asabeneh/30DaysOfJavaScript/blob/master/13_Day/13_day_console_object_methods.md) | [Day 15>>](#)
+[<< Day 13](https://github.com/Asabeneh/30DaysOfJavaScript/blob/master/13_Day/13_day_console_object_methods.md) | [Day 15>>](https://github.com/Asabeneh/30DaysOfJavaScript/blob/master/15_Day/15_day_15_classes.md)
 
 ![Thirty Days Of JavaScript](../images/banners/day_1_14.png)
 
@@ -190,4 +190,4 @@ Practice
 
 🎉 CONGRATULATIONS ! 🎉
 
-[<< Day 13](https://github.com/Asabeneh/30DaysOfJavaScript/blob/master/13_Day/13_day_console_object_methods.md) | [Day 15>>](#)
+[<< Day 13](https://github.com/Asabeneh/30DaysOfJavaScript/blob/master/13_Day/13_day_console_object_methods.md) | [Day 15>>](https://github.com/Asabeneh/30DaysOfJavaScript/blob/master/15_Day/15_day_15_classes.md)
diff --git a/15_Day/15_day_classes.md b/15_Day/15_day_classes.md
new file mode 100644
index 0000000..908d192
--- /dev/null
+++ b/15_Day/15_day_classes.md
@@ -0,0 +1,716 @@
+<div align="center">
+  <h1> 30 Days Of JavaScript</h1>
+  <a class="header-badge" target="_blank" href="https://www.linkedin.com/in/asabeneh/">
+  <img src="https://img.shields.io/badge/style--5eba00.svg?label=LinkedIn&logo=linkedin&style=social">
+  </a>
+  <a class="header-badge" target="_blank" href="https://twitter.com/Asabeneh">
+  <img alt="Twitter Follow" src="https://img.shields.io/twitter/follow/asabeneh?style=social">
+  </a>
+
+<sub>Author:
+<a href="https://www.linkedin.com/in/asabeneh/" target="_blank">Asabeneh Yetayeh</a><br>
+<small> January, 2020</small>
+</sub>
+
+</div>
+
+[<< Day 14](https://github.com/Asabeneh/30DaysOfJavaScript/blob/master/14_Day/14_day_error_handling.md) | [Day 16>>](#)
+
+![Thirty Days Of JavaScript](../images/banners/day_1_15.png)
+
+- [Day 15](#day-15)
+  - [Classes](#classes)
+    - [Defining a classes](#defining-a-classes)
+    - [Class Instantiation](#class-instantiation)
+    - [Class Constructor](#class-constructor)
+    - [Default values with constructor](#default-values-with-constructor)
+    - [Class methods](#class-methods)
+    - [Properties with initial value](#properties-with-initial-value)
+    - [getter](#getter)
+    - [setter](#setter)
+    - [Static method](#static-method)
+  - [Inheritance](#inheritance)
+    - [Overriding methods](#overriding-methods)
+  - [Exercises](#exercises)
+    - [Exercises Level 1](#exercises-level-1)
+    - [Exercises Level 2](#exercises-level-2)
+    - [Exercises Level 3](#exercises-level-3)
+# Day 15
+
+## Classes
+
+JavaScript is an object oriented programming language. Everything in JavScript is an object, with its properties and methods. We create class to create an object. A Class is like an object constructor, or a "blueprint" for creating objects. We instantiate a class to create an object. The class defines attributes and the behavior of the object, while the object, on the other hand, represents the class.
+
+Once we create a class we can create object from it whenever we want. Creating an object from a class is called class instantiation.
+
+In the object section, we saw how to create an object literal. Object literal is a singleton. If we want to get a similar object , we have to write it. However, class allows to create many objects. This helps to reduce amount of code and repetition of code.
+
+### Defining a classes
+
+To define a class in JavaScript we need the keyword _class_ , the name of a class in **CamelCase** and block code(two curly brackets). Let us create a class name Person.
+
+```sh
+// syntax
+class ClassName {
+    //  code goes here
+}
+
+```
+
+**Example:**
+
+```js
+class Person {
+  // code goes here
+}
+```
+
+We have created an Person class but it does not have any thing inside.
+
+### Class Instantiation
+
+Instantiation class means creating an object from a class. We need the keyword _new_ and we call the name of the class after the word new.
+
+Let us create a dog object from our Person class.
+
+```js
+class Person {
+  // code goes here
+}
+const person = new Person()
+console.log(person)
+```
+
+```sh
+Person {}
+```
+
+As you can see, we have created a person object. Since the class did not have any properties yet the object is also empty.
+
+Let use the class constructor to pass different properties for the class.
+
+### Class Constructor
+
+The constructor is a builtin function which allows as to create a blueprint for our object. The constructor function starts with a keyword constructor followed by a parenthesis. Inside the parenthesis we pass the properties of the object as parameter. We use the _this_ keyword to attach the constructor parameters with the class.
+
+The following Person class constructor has firstName and lastName property. These properties are attached to the Person class using _this_ keyword. _This_ refers to the class itself.
+
+```js
+class Person {
+  constructor(firstName, lastName) {
+    console.log(this) // Check the output from here
+    this.firstName = firstName
+    this.lastName = lastName
+  }
+}
+
+const person = new Person()
+
+console.log(person)
+```
+
+```sh
+Person {firstName: undefined, lastName}
+```
+
+All the keys of the object are undefined. When ever we instantiate we should pass the value of the properties. Let us pass value at this time when we instantiate the class.
+
+```js
+class Person {
+  constructor(firstName, lastName) {
+    this.firstName = firstName
+    this.lastName = lastName
+  }
+}
+
+const person1 = new Person('Asabeneh', 'Yetayeh')
+
+console.log(person1)
+```
+
+```sh
+Person {firstName: "Asabeneh", lastName: "Yetayeh"}
+```
+
+As we have stated at the very beginning that once we create a class we can create many object using the class. Now, let us create many person objects using the Person class.
+
+```js
+class Person {
+  constructor(firstName, lastName) {
+    console.log(this) // Check the output from here
+    this.firstName = firstName
+    this.lastName = lastName
+  }
+}
+
+const person1 = new Person('Asabeneh', 'Yetayeh')
+const person2 = new Person('Lidiya', 'Tekle')
+const person3 = new Person('Abraham', 'Yetayeh')
+
+console.log(person1)
+console.log(person2)
+console.log(person3)
+```
+
+```sh
+Person {firstName: "Asabeneh", lastName: "Yetayeh"}
+Person {firstName: "Lidiya", lastName: "Tekle"}
+Person {firstName: "Abraham", lastName: "Yetayeh"}
+```
+
+Using the class Person we created three persons object. As you can see our class did not many properties let us add more properties to the class.
+
+```js
+class Person {
+  constructor(firstName, lastName, age, country, city) {
+    console.log(this) // Check the output from here
+    this.firstName = firstName
+    this.lastName = lastName
+    this.age = age
+    this.country = country
+    this.city = city
+  }
+}
+
+const person1 = new Person('Asabeneh', 'Yetayeh', 250, 'Finland', 'Helsinki')
+
+console.log(person1)
+```
+
+```sh
+Person {firstName: "Asabeneh", lastName: "Yetayeh", age: 250, country: "Finland", city: "Helsinki"}
+```
+
+### Default values with constructor
+
+The constructor function properties may have a default value like other regular functions.
+
+```js
+class Person {
+  constructor(
+    firstName = 'Asabeneh',
+    lastName = 'Yetayeh',
+    age = 250,
+    country = 'Finland',
+    city = 'Helsinki'
+  ) {
+    this.firstName = firstName
+    this.lastName = lastName
+    this.age = age
+    this.country = country
+    this.city = city
+  }
+}
+
+const person1 = new Person() // it will take the default values
+const person1 = new Person('Lidiya', 'Tekle', 28, 'Finland', 'Espoo')
+
+console.log(person1)
+```
+
+```sh
+Person {firstName: "Asabeneh", lastName: "Yetayeh", age: 250, country: "Finland", city: "Helsinki"}
+Person {firstName: "Lidiya", lastName: "Tekle", age: 28, country: "Finland", city: "Espoo"}
+```
+
+### Class methods
+
+The constructor inside a class is a builtin function which allow us to create a blueprint for the object. In a class we can create class methods. Methods are JavaScript functions inside the class. Let us create some class methods.
+
+```js
+class Person {
+  constructor(firstName, lastName, age, country, city) {
+    this.firstName = firstName
+    this.lastName = lastName
+    this.age = age
+    this.country = country
+    this.city = city
+  }
+  getFullName() {
+    const fullName = this.firstName + ' ' + this.lastName
+    return fullName
+  }
+}
+
+const person1 = new Person('Asabeneh', 'Yetayeh', 250, 'Finland', 'Helsinki')
+const person2 = new Person('Lidiya', 'Tekle', 28, 'Finland', 'Espoo')
+
+console.log(person1.getFullName())
+console.log(person2.getFullName())
+```
+
+```sh
+Asabeneh Yetayeh
+test.js:19 Lidiya Tekle
+```
+
+### Properties with initial value
+
+When we create a class for some properties we may have an initial value. For instance if you are playing a game, you starting score will be zero. So, we may have a starting score or score which is zero. In other way, we may have an initial skill and we will acquire some skill after some time.
+
+```js
+class Person {
+  constructor(firstName, lastName, age, country, city) {
+    this.firstName = firstName
+    this.lastName = lastName
+    this.age = age
+    this.country = country
+    this.city = city
+    this.score = 0
+    this.skills = []
+  }
+  getFullName() {
+    const fullName = this.firstName + ' ' + this.lastName
+    return fullName
+  }
+}
+
+const person1 = new Person('Asabeneh', 'Yetayeh', 250, 'Finland', 'Helsinki')
+const person2 = new Person('Lidiya', 'Tekle', 28, 'Finland', 'Espoo')
+
+console.log(person1.score)
+console.log(person2.score)
+
+console.log(person1.skills)
+console.log(person2.skills)
+```
+
+```sh
+0
+0
+[]
+[]
+```
+
+A method could be regular method or a getter or a setter. Let us see, getter and setter.
+
+### getter
+
+The get method allow us to access value from the object. We write a get method using keyword _get_ followed by a function. Instead of accessing properties directly from the object we use getter to get the value. See the example bellow
+
+```js
+class Person {
+  constructor(firstName, lastName, age, country, city) {
+    this.firstName = firstName
+    this.lastName = lastName
+    this.age = age
+    this.country = country
+    this.city = city
+    this.score = 0
+    this.skills = []
+  }
+  getFullName() {
+    const fullName = this.firstName + ' ' + this.lastName
+    return fullName
+  }
+  get getscore() {
+    return this.score
+  }
+  get getSkills() {
+    return this.skills
+  }
+}
+
+const person1 = new Person('Asabeneh', 'Yetayeh', 250, 'Finland', 'Helsinki')
+const person2 = new Person('Lidiya', 'Tekle', 28, 'Finland', 'Espoo')
+
+console.log(person1.getScore) // We do not need parenthesis to call a getter method
+console.log(person2.getScore)
+
+console.log(person1.getSkills)
+console.log(person2.getSkills)
+```
+
+```sh
+0
+0
+[]
+[]
+```
+
+### setter
+
+The setter method allow us to modify the value of certain properties. We write a setter method using keyword _set_ followed by a function. See the example bellow.
+
+```js
+class Person {
+  constructor(firstName, lastName, age, country, city) {
+    this.firstName = firstName
+    this.lastName = lastName
+    this.age = age
+    this.country = country
+    this.city = city
+    this.score = 0
+    this.skills = []
+  }
+  getFullName() {
+    const fullName = this.firstName + ' ' + this.lastName
+    return fullName
+  }
+  get getScore() {
+    return this.score
+  }
+  get getSkills() {
+    return this.skills
+  }
+  set setScore(score) {
+    this.score += score
+  }
+  set setSkill(skill) {
+    this.skills.push(skill)
+  }
+}
+
+const person1 = new Person('Asabeneh', 'Yetayeh', 250, 'Finland', 'Helsinki')
+const person2 = new Person('Lidiya', 'Tekle', 28, 'Finland', 'Espoo')
+
+person1.setScore = 1
+person1.setSkill = 'HTML'
+person1.setSkill = 'CSS'
+person1.setSkill = 'JavaScript'
+
+person2.setScore = 1
+person2.setSkill = 'Planning'
+person2.setSkill = 'Managing'
+person2.setSkill = 'Organizing'
+
+console.log(person1.score)
+console.log(person2.score)
+
+console.log(person1.skills)
+console.log(person2.skills)
+```
+
+```sh
+1
+1
+["HTML", "CSS", "JavaScript"]
+["Planning", "Managing", "Organizing"]
+```
+
+Do not be puzzled by the difference between regular method and a getter. If you know how to make a regular method you are good. Let us add regular method called getPersonInfo in the Person class.
+
+```js
+class Person {
+  constructor(firstName, lastName, age, country, city) {
+    this.firstName = firstName
+    this.lastName = lastName
+    this.age = age
+    this.country = country
+    this.city = city
+    this.score = 0
+    this.skills = []
+  }
+  getFullName() {
+    const fullName = this.firstName + ' ' + this.lastName
+    return fullName
+  }
+  get getScore() {
+    return this.score
+  }
+  get getSkills() {
+    return this.skills
+  }
+  set setScore(score) {
+    this.score += score
+  }
+  set setSkill(skill) {
+    this.skills.push(skill)
+  }
+  getPersonInfo() {
+    let fullName = this.getFullName()
+    let skills =
+      this.skills.length > 0 &&
+      this.skills.slice(0, this.skills.length - 1).join(', ') +
+        ` and ${this.skills[this.skills.length - 1]}`
+    let formattedSkills = skills ? `He knows ${skills}` : ''
+
+    let info = `${fullName} is ${this.age}. He lives ${this.city}, ${this.country}. ${formattedSkills}`
+    return info
+  }
+}
+
+const person1 = new Person('Asabeneh', 'Yetayeh', 250, 'Finland', 'Helsinki')
+const person2 = new Person('Lidiya', 'Tekle', 28, 'Finland', 'Espoo')
+const person3 = new Person('John', 'Doe', 50, 'Mars', 'Mars city')
+
+person1.setScore = 1
+person1.setSkill = 'HTML'
+person1.setSkill = 'CSS'
+person1.setSkill = 'JavaScript'
+
+person2.setScore = 1
+person2.setSkill = 'Planning'
+person2.setSkill = 'Managing'
+person2.setSkill = 'Organizing'
+
+console.log(person1.getScore)
+console.log(person2.getScore)
+
+console.log(person1.getSkills)
+console.log(person2.getSkills)
+console.log(person3.getSkills)
+
+console.log(person1.getPersonInfo())
+console.log(person2.getPersonInfo())
+console.log(person3.getPersonInfo())
+```
+
+```sh
+1
+1
+["HTML", "CSS", "JavaScript"]
+["Planning", "Managing", "Organizing"]
+[]
+Asabeneh Yetayeh is 250. He lives Helsinki, Finland. He knows HTML, CSS and JavaScript
+Lidiya Tekle is 28. He lives Espoo, Finland. He knows Planning, Managing and Organizing
+John Doe is 50. He lives Mars city, Mars.
+```
+
+### Static method
+
+The static keyword defines a static method for a class. Static methods are not called on instances of the class. Instead, they are called on the class itself. These are often utility functions, such as functions to create or clone objects. An example of static method is _Date.now()_. The _now_ method is called directly from the class.
+
+```js
+class Person {
+  constructor(firstName, lastName, age, country, city) {
+    this.firstName = firstName
+    this.lastName = lastName
+    this.age = age
+    this.country = country
+    this.city = city
+    this.score = 0
+    this.skills = []
+  }
+  getFullName() {
+    const fullName = this.firstName + ' ' + this.lastName
+    return fullName
+  }
+  get getScore() {
+    return this.score
+  }
+  get getSkills() {
+    return this.skills
+  }
+  set setScore(score) {
+    this.score += score
+  }
+  set setSkill(skill) {
+    this.skills.push(skill)
+  }
+  getPersonInfo() {
+    let fullName = this.getFullName()
+    let skills =
+      this.skills.length > 0 &&
+      this.skills.slice(0, this.skills.length - 1).join(', ') +
+        ` and ${this.skills[this.skills.length - 1]}`
+
+    let formattedSkills = skills ? `He knows ${skills}` : ''
+
+    let info = `${fullName} is ${this.age}. He lives ${this.city}, ${this.country}. ${formattedSkills}`
+    console.log(this)
+    return info
+  }
+  static favoriteSkill() {
+    const skills = ['HTML', 'CSS', 'JS', 'React', 'Python', 'Node']
+    const index = Math.floor(Math.random() * skills.length)
+    console.log('hi')
+    return skills[index]
+  }
+  static showDateTime() {
+    let now = new Date()
+    let year = now.getFullYear()
+    let month = now.getMonth() + 1
+    let date = now.getDate()
+    let hours = now.getHours()
+    let minutes = now.getMinutes()
+    if (hours < 10) {
+      hours = '0' + hours
+    }
+    if (minutes < 10) {
+      minutes = '0' + minutes
+    }
+
+    let dateMonthYear = date + '.' + month + '.' + year
+    let time = hours + ':' + minutes
+    let fullTime = dateMonthYear + ' ' + time
+    return fullTime
+  }
+}
+
+console.log(Person.favoriteSkill())
+console.log(Person.showDateTime())
+```
+
+```sh
+Node
+15.1.2020 23:56
+```
+
+The static methods are methods which can be used as utility functions.
+
+## Inheritance
+
+Using inheritance we can access all the properties and the methods of the parent class. This reduces repetition of code. If you remember, we have a Person parent class and we will create children from it. Our children class could be student, teach etc.
+
+```js
+// syntax
+class ChildClassName extends {
+ // code goes here
+}
+```
+
+Let us create a Student child class from Person parent class.
+
+```js
+class Student extends Person {
+  saySomething() {
+    console.log('I am a child of the person class')
+  }
+}
+
+const s1 = new Student('Asabeneh', 'Yetayeh', 'Finland', 250, 'Helsinki')
+console.log(s1)
+console.log(s1.saySomething())
+console.log(s1.getFullName())
+console.log(s1.getPersonInfo())
+```
+
+```sh
+Student {firstName: "Asabeneh", lastName: "Yetayeh", age: "Finland", country: 250, city: "Helsinki", …}
+I am a child of the person class
+Asabeneh Yetayeh
+Student {firstName: "Asabeneh", lastName: "Yetayeh", age: "Finland", country: 250, city: "Helsinki", …}
+Asabeneh Yetayeh is Finland. He lives Helsinki, 250.
+```
+
+### Overriding methods
+
+As you can see, we manage to access all the methods in the Person Class and we used it in the Student child class. We can customize the parent methods, we can add additional properties to a child class. If we want to customize, the methods and if we want to add extra properties, we need to use the constructor function the child class too. In side the constructor function we call the super() function to access all the properties from the parent class. The Person class didn't have gender but now let us give gender property for the child class, Student. If the same method name used in the child class, the parent method will be overridden.
+
+```js
+class Student extends Person {
+  constructor(firstName, lastName, age, country, city, gender) {
+    super(firstName, lastName, age, country, city)
+    this.gender = gender
+  }
+
+  saySomething() {
+    console.log('I am a child of the person class')
+  }
+  getPersonInfo() {
+    let fullName = this.getFullName()
+    let skills =
+      this.skills.length > 0 &&
+      this.skills.slice(0, this.skills.length - 1).join(', ') +
+        ` and ${this.skills[this.skills.length - 1]}`
+
+    let formattedSkills = skills ? `He knows ${skills}` : ''
+    let pronoun = this.gender == 'Male' ? 'He' : 'She'
+
+    let info = `${fullName} is ${this.age}. ${pronoun} lives in ${this.city}, ${this.country}. ${formattedSkills}`
+    console.log(this)
+    return info
+  }
+}
+
+const s1 = new Student(
+  'Asabeneh',
+  'Yetayeh',
+  250,
+  'Finland',
+  'Helsinki',
+  'Male'
+)
+const s2 = new Student('Lidiya', 'Tekle', 28, 'Finland', 'Helsinki', 'Female')
+s1.setScore = 1
+s1.setSkill = 'HTML'
+s1.setSkill = 'CSS'
+s1.setSkill = 'JavaScript'
+
+s2.setScore = 1
+s2.setSkill = 'Planning'
+s2.setSkill = 'Managing'
+s2.setSkill = 'Organizing'
+
+console.log(s1)
+
+console.log(s1.saySomething())
+console.log(s1.getFullName())
+console.log(s1.getPersonInfo())
+
+console.log(s2.saySomething())
+console.log(s2.getFullName())
+console.log(s2.getPersonInfo())
+```
+
+```sh
+Student {firstName: "Asabeneh", lastName: "Yetayeh", age: 250, country: "Finland", city: "Helsinki", …}
+Student {firstName: "Lidiya", lastName: "Tekle", age: 28, country: "Finland", city: "Helsinki", …}
+I am a child of the person class
+Asabeneh Yetayeh
+Student {firstName: "Asabeneh", lastName: "Yetayeh", age: 250, country: "Finland", city: "Helsinki", …}
+Asabeneh Yetayeh is 250. He lives in Helsinki, Finland. He knows HTML, CSS and JavaScript
+I am a child of the person class
+Lidiya Tekle
+Student {firstName: "Lidiya", lastName: "Tekle", age: 28, country: "Finland", city: "Helsinki", …}
+Lidiya Tekle is 28. She lives in Helsinki, Finland. He knows Planning, Managing and Organizing
+```
+
+Now, the getPersonInfo method has been overridden and it identifies if the person is male or female.
+
+🌕 You are excelling. Now, you knew class and you have the power to turn everything to an object. You made it to half way to your way to greatness. Now do some exercises for your brain and for your muscle.
+
+## Exercises
+
+### Exercises Level 1
+
+1. Create an Animal class. The class will have name, age, color, legs properties and create different methods
+2. Create a Dog and Cat child class from the Animal Class.
+
+### Exercises Level 2
+
+1. Override the method you create in Animal class
+
+### Exercises Level 3
+
+1. Let's try to develop a program which calculate measure of central tendency of a sample(mean, median, mode) and measure of variability(range, variance, standard deviation). In addition to those measures find the min, max, count, percentile, and frequency distribution of the sample. You can create a class called Statistics and create all the functions which do statistical calculations as method for the Statistics class. Check the output below.
+
+```JS
+ages = [31, 26, 34, 37, 27, 26, 32, 32, 26, 27, 27, 24, 32, 33, 27, 25, 26, 38, 37, 31, 34, 24, 33, 29, 26]
+
+console.log('Count:', statistics.count()) # 25
+console.log('Sum: ', statistics.sum()) # 744
+console.log('Min: ', statistics.min()) # 24
+console.log('Max: ', statistics.max()) # 38
+console.log('Range: ', statistics.range() # 14
+console.log('Mean: ', statistics.mean()) # 30
+console.log('Median: ',statistics.median()) # 29
+console.log('Mode: ', statistics.mode()) # {'mode': 26, 'count': 5}
+console.log('Variance: ',statistics.var()) # 17.5
+console.log('Standard Deviation: ', statistics.std()) # 4.2
+console.log('Variance: ',statistics.var()) # 17.5
+console.log('Frequency Distribution: ',statistics.freqDist()) # [(20.0, 26), (16.0, 27), (12.0, 32), (8.0, 37), (8.0, 34), (8.0, 33), (8.0, 31), (8.0, 24), (4.0, 38), (4.0, 29), (4.0, 25)]
+```
+
+```sh
+// you output should look like this
+console.log(statistics.describe())
+Count: 25
+Sum:  744
+Min:  24
+Max:  38
+Range:  14
+Mean:  30
+Median:  29
+Mode:  (26, 5)
+Variance:  17.5
+Standard Deviation:  4.2
+Frequency Distribution: [(20.0, 26), (16.0, 27), (12.0, 32), (8.0, 37), (8.0, 34), (8.0, 33), (8.0, 31), (8.0, 24), (4.0, 38), (4.0, 29), (4.0, 25)]
+```
+
+1. Create a class called PersonAccount. It has firstname, lastname, incomes, expenses properties and it has total_income, total_expense, account_info,add_income, add_expense and account_balance methods. Incomes is a set of incomes and its description and the same goes for expenses.
+
+🎉 CONGRATULATIONS ! 🎉
+
+[<< Day 14](https://github.com/Asabeneh/30DaysOfJavaScript/blob/master/14_Day/14_day_error_handling.md) | [Day 16>>](#)
\ No newline at end of file
diff --git a/15_Day/15_day_starter/data/countries_data.js b/15_Day/15_day_starter/data/countries_data.js
new file mode 100644
index 0000000..92acddd
--- /dev/null
+++ b/15_Day/15_day_starter/data/countries_data.js
@@ -0,0 +1,2013 @@
+const countries = [
+  {
+    name: 'Afghanistan',
+    capital: 'Kabul',
+    languages: ['Pashto', 'Uzbek', 'Turkmen'],
+    population: 27657145,
+    flag: 'https://restcountries.eu/data/afg.svg',
+    currency: 'Afghan afghani'
+  },
+  {
+    name: 'Åland Islands',
+    capital: 'Mariehamn',
+    languages: ['Swedish'],
+    population: 28875,
+    flag: 'https://restcountries.eu/data/ala.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Albania',
+    capital: 'Tirana',
+    languages: ['Albanian'],
+    population: 2886026,
+    flag: 'https://restcountries.eu/data/alb.svg',
+    currency: 'Albanian lek'
+  },
+  {
+    name: 'Algeria',
+    capital: 'Algiers',
+    languages: ['Arabic'],
+    population: 40400000,
+    flag: 'https://restcountries.eu/data/dza.svg',
+    currency: 'Algerian dinar'
+  },
+  {
+    name: 'American Samoa',
+    capital: 'Pago Pago',
+    languages: ['English', 'Samoan'],
+    population: 57100,
+    flag: 'https://restcountries.eu/data/asm.svg',
+    currency: 'United State Dollar'
+  },
+  {
+    name: 'Andorra',
+    capital: 'Andorra la Vella',
+    languages: ['Catalan'],
+    population: 78014,
+    flag: 'https://restcountries.eu/data/and.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Angola',
+    capital: 'Luanda',
+    languages: ['Portuguese'],
+    population: 25868000,
+    flag: 'https://restcountries.eu/data/ago.svg',
+    currency: 'Angolan kwanza'
+  },
+  {
+    name: 'Anguilla',
+    capital: 'The Valley',
+    languages: ['English'],
+    population: 13452,
+    flag: 'https://restcountries.eu/data/aia.svg',
+    currency: 'East Caribbean dollar'
+  },
+  {
+    name: 'Antarctica',
+    capital: '',
+    languages: ['English', 'Russian'],
+    population: 1000,
+    flag: 'https://restcountries.eu/data/ata.svg',
+    currency: 'Australian dollar'
+  },
+  {
+    name: 'Antigua and Barbuda',
+    capital: "Saint John's",
+    languages: ['English'],
+    population: 86295,
+    flag: 'https://restcountries.eu/data/atg.svg',
+    currency: 'East Caribbean dollar'
+  },
+  {
+    name: 'Argentina',
+    capital: 'Buenos Aires',
+    languages: ['Spanish', 'Guaraní'],
+    population: 43590400,
+    flag: 'https://restcountries.eu/data/arg.svg',
+    currency: 'Argentine peso'
+  },
+  {
+    name: 'Armenia',
+    capital: 'Yerevan',
+    languages: ['Armenian', 'Russian'],
+    population: 2994400,
+    flag: 'https://restcountries.eu/data/arm.svg',
+    currency: 'Armenian dram'
+  },
+  {
+    name: 'Aruba',
+    capital: 'Oranjestad',
+    languages: ['Dutch', '(Eastern) Punjabi'],
+    population: 107394,
+    flag: 'https://restcountries.eu/data/abw.svg',
+    currency: 'Aruban florin'
+  },
+  {
+    name: 'Australia',
+    capital: 'Canberra',
+    languages: ['English'],
+    population: 24117360,
+    flag: 'https://restcountries.eu/data/aus.svg',
+    currency: 'Australian dollar'
+  },
+  {
+    name: 'Austria',
+    capital: 'Vienna',
+    languages: ['German'],
+    population: 8725931,
+    flag: 'https://restcountries.eu/data/aut.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Azerbaijan',
+    capital: 'Baku',
+    languages: ['Azerbaijani'],
+    population: 9730500,
+    flag: 'https://restcountries.eu/data/aze.svg',
+    currency: 'Azerbaijani manat'
+  },
+  {
+    name: 'Bahamas',
+    capital: 'Nassau',
+    languages: ['English'],
+    population: 378040,
+    flag: 'https://restcountries.eu/data/bhs.svg',
+    currency: 'Bahamian dollar'
+  },
+  {
+    name: 'Bahrain',
+    capital: 'Manama',
+    languages: ['Arabic'],
+    population: 1404900,
+    flag: 'https://restcountries.eu/data/bhr.svg',
+    currency: 'Bahraini dinar'
+  },
+  {
+    name: 'Bangladesh',
+    capital: 'Dhaka',
+    languages: ['Bengali'],
+    population: 161006790,
+    flag: 'https://restcountries.eu/data/bgd.svg',
+    currency: 'Bangladeshi taka'
+  },
+  {
+    name: 'Barbados',
+    capital: 'Bridgetown',
+    languages: ['English'],
+    population: 285000,
+    flag: 'https://restcountries.eu/data/brb.svg',
+    currency: 'Barbadian dollar'
+  },
+  {
+    name: 'Belarus',
+    capital: 'Minsk',
+    languages: ['Belarusian', 'Russian'],
+    population: 9498700,
+    flag: 'https://restcountries.eu/data/blr.svg',
+    currency: 'New Belarusian ruble'
+  },
+  {
+    name: 'Belgium',
+    capital: 'Brussels',
+    languages: ['Dutch', 'French', 'German'],
+    population: 11319511,
+    flag: 'https://restcountries.eu/data/bel.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Belize',
+    capital: 'Belmopan',
+    languages: ['English', 'Spanish'],
+    population: 370300,
+    flag: 'https://restcountries.eu/data/blz.svg',
+    currency: 'Belize dollar'
+  },
+  {
+    name: 'Benin',
+    capital: 'Porto-Novo',
+    languages: ['French'],
+    population: 10653654,
+    flag: 'https://restcountries.eu/data/ben.svg',
+    currency: 'West African CFA franc'
+  },
+  {
+    name: 'Bermuda',
+    capital: 'Hamilton',
+    languages: ['English'],
+    population: 61954,
+    flag: 'https://restcountries.eu/data/bmu.svg',
+    currency: 'Bermudian dollar'
+  },
+  {
+    name: 'Bhutan',
+    capital: 'Thimphu',
+    languages: ['Dzongkha'],
+    population: 775620,
+    flag: 'https://restcountries.eu/data/btn.svg',
+    currency: 'Bhutanese ngultrum'
+  },
+  {
+    name: 'Bolivia (Plurinational State of)',
+    capital: 'Sucre',
+    languages: ['Spanish', 'Aymara', 'Quechua'],
+    population: 10985059,
+    flag: 'https://restcountries.eu/data/bol.svg',
+    currency: 'Bolivian boliviano'
+  },
+  {
+    name: 'Bonaire, Sint Eustatius and Saba',
+    capital: 'Kralendijk',
+    languages: ['Dutch'],
+    population: 17408,
+    flag: 'https://restcountries.eu/data/bes.svg',
+    currency: 'United States dollar'
+  },
+  {
+    name: 'Bosnia and Herzegovina',
+    capital: 'Sarajevo',
+    languages: ['Bosnian', 'Croatian', 'Serbian'],
+    population: 3531159,
+    flag: 'https://restcountries.eu/data/bih.svg',
+    currency: 'Bosnia and Herzegovina convertible mark'
+  },
+  {
+    name: 'Botswana',
+    capital: 'Gaborone',
+    languages: ['English', 'Tswana'],
+    population: 2141206,
+    flag: 'https://restcountries.eu/data/bwa.svg',
+    currency: 'Botswana pula'
+  },
+  {
+    name: 'Bouvet Island',
+    capital: '',
+    languages: ['Norwegian', 'Norwegian Bokmål', 'Norwegian Nynorsk'],
+    population: 0,
+    flag: 'https://restcountries.eu/data/bvt.svg',
+    currency: 'Norwegian krone'
+  },
+  {
+    name: 'Brazil',
+    capital: 'Brasília',
+    languages: ['Portuguese'],
+    population: 206135893,
+    flag: 'https://restcountries.eu/data/bra.svg',
+    currency: 'Brazilian real'
+  },
+  {
+    name: 'British Indian Ocean Territory',
+    capital: 'Diego Garcia',
+    languages: ['English'],
+    population: 3000,
+    flag: 'https://restcountries.eu/data/iot.svg',
+    currency: 'United States dollar'
+  },
+  {
+    name: 'United States Minor Outlying Islands',
+    capital: '',
+    languages: ['English'],
+    population: 300,
+    flag: 'https://restcountries.eu/data/umi.svg',
+    currency: 'United States Dollar'
+  },
+  {
+    name: 'Virgin Islands (British)',
+    capital: 'Road Town',
+    languages: ['English'],
+    population: 28514,
+    flag: 'https://restcountries.eu/data/vgb.svg',
+    currency: '[D]'
+  },
+  {
+    name: 'Virgin Islands (U.S.)',
+    capital: 'Charlotte Amalie',
+    languages: ['English'],
+    population: 114743,
+    flag: 'https://restcountries.eu/data/vir.svg',
+    currency: 'United States dollar'
+  },
+  {
+    name: 'Brunei Darussalam',
+    capital: 'Bandar Seri Begawan',
+    languages: ['Malay'],
+    population: 411900,
+    flag: 'https://restcountries.eu/data/brn.svg',
+    currency: 'Brunei dollar'
+  },
+  {
+    name: 'Bulgaria',
+    capital: 'Sofia',
+    languages: ['Bulgarian'],
+    population: 7153784,
+    flag: 'https://restcountries.eu/data/bgr.svg',
+    currency: 'Bulgarian lev'
+  },
+  {
+    name: 'Burkina Faso',
+    capital: 'Ouagadougou',
+    languages: ['French', 'Fula'],
+    population: 19034397,
+    flag: 'https://restcountries.eu/data/bfa.svg',
+    currency: 'West African CFA franc'
+  },
+  {
+    name: 'Burundi',
+    capital: 'Bujumbura',
+    languages: ['French', 'Kirundi'],
+    population: 10114505,
+    flag: 'https://restcountries.eu/data/bdi.svg',
+    currency: 'Burundian franc'
+  },
+  {
+    name: 'Cambodia',
+    capital: 'Phnom Penh',
+    languages: ['Khmer'],
+    population: 15626444,
+    flag: 'https://restcountries.eu/data/khm.svg',
+    currency: 'Cambodian riel'
+  },
+  {
+    name: 'Cameroon',
+    capital: 'Yaoundé',
+    languages: ['English', 'French'],
+    population: 22709892,
+    flag: 'https://restcountries.eu/data/cmr.svg',
+    currency: 'Central African CFA franc'
+  },
+  {
+    name: 'Canada',
+    capital: 'Ottawa',
+    languages: ['English', 'French'],
+    population: 36155487,
+    flag: 'https://restcountries.eu/data/can.svg',
+    currency: 'Canadian dollar'
+  },
+  {
+    name: 'Cabo Verde',
+    capital: 'Praia',
+    languages: ['Portuguese'],
+    population: 531239,
+    flag: 'https://restcountries.eu/data/cpv.svg',
+    currency: 'Cape Verdean escudo'
+  },
+  {
+    name: 'Cayman Islands',
+    capital: 'George Town',
+    languages: ['English'],
+    population: 58238,
+    flag: 'https://restcountries.eu/data/cym.svg',
+    currency: 'Cayman Islands dollar'
+  },
+  {
+    name: 'Central African Republic',
+    capital: 'Bangui',
+    languages: ['French', 'Sango'],
+    population: 4998000,
+    flag: 'https://restcountries.eu/data/caf.svg',
+    currency: 'Central African CFA franc'
+  },
+  {
+    name: 'Chad',
+    capital: "N'Djamena",
+    languages: ['French', 'Arabic'],
+    population: 14497000,
+    flag: 'https://restcountries.eu/data/tcd.svg',
+    currency: 'Central African CFA franc'
+  },
+  {
+    name: 'Chile',
+    capital: 'Santiago',
+    languages: ['Spanish'],
+    population: 18191900,
+    flag: 'https://restcountries.eu/data/chl.svg',
+    currency: 'Chilean peso'
+  },
+  {
+    name: 'China',
+    capital: 'Beijing',
+    languages: ['Chinese'],
+    population: 1377422166,
+    flag: 'https://restcountries.eu/data/chn.svg',
+    currency: 'Chinese yuan'
+  },
+  {
+    name: 'Christmas Island',
+    capital: 'Flying Fish Cove',
+    languages: ['English'],
+    population: 2072,
+    flag: 'https://restcountries.eu/data/cxr.svg',
+    currency: 'Australian dollar'
+  },
+  {
+    name: 'Cocos (Keeling) Islands',
+    capital: 'West Island',
+    languages: ['English'],
+    population: 550,
+    flag: 'https://restcountries.eu/data/cck.svg',
+    currency: 'Australian dollar'
+  },
+  {
+    name: 'Colombia',
+    capital: 'Bogotá',
+    languages: ['Spanish'],
+    population: 48759958,
+    flag: 'https://restcountries.eu/data/col.svg',
+    currency: 'Colombian peso'
+  },
+  {
+    name: 'Comoros',
+    capital: 'Moroni',
+    languages: ['Arabic', 'French'],
+    population: 806153,
+    flag: 'https://restcountries.eu/data/com.svg',
+    currency: 'Comorian franc'
+  },
+  {
+    name: 'Congo',
+    capital: 'Brazzaville',
+    languages: ['French', 'Lingala'],
+    population: 4741000,
+    flag: 'https://restcountries.eu/data/cog.svg',
+    currency: 'Central African CFA franc'
+  },
+  {
+    name: 'Congo (Democratic Republic of the)',
+    capital: 'Kinshasa',
+    languages: ['French', 'Lingala', 'Kongo', 'Swahili', 'Luba-Katanga'],
+    population: 85026000,
+    flag: 'https://restcountries.eu/data/cod.svg',
+    currency: 'Congolese franc'
+  },
+  {
+    name: 'Cook Islands',
+    capital: 'Avarua',
+    languages: ['English'],
+    population: 18100,
+    flag: 'https://restcountries.eu/data/cok.svg',
+    currency: 'New Zealand dollar'
+  },
+  {
+    name: 'Costa Rica',
+    capital: 'San José',
+    languages: ['Spanish'],
+    population: 4890379,
+    flag: 'https://restcountries.eu/data/cri.svg',
+    currency: 'Costa Rican colón'
+  },
+  {
+    name: 'Croatia',
+    capital: 'Zagreb',
+    languages: ['Croatian'],
+    population: 4190669,
+    flag: 'https://restcountries.eu/data/hrv.svg',
+    currency: 'Croatian kuna'
+  },
+  {
+    name: 'Cuba',
+    capital: 'Havana',
+    languages: ['Spanish'],
+    population: 11239004,
+    flag: 'https://restcountries.eu/data/cub.svg',
+    currency: 'Cuban convertible peso'
+  },
+  {
+    name: 'Curaçao',
+    capital: 'Willemstad',
+    languages: ['Dutch', '(Eastern) Punjabi', 'English'],
+    population: 154843,
+    flag: 'https://restcountries.eu/data/cuw.svg',
+    currency: 'Netherlands Antillean guilder'
+  },
+  {
+    name: 'Cyprus',
+    capital: 'Nicosia',
+    languages: ['Greek (modern)', 'Turkish', 'Armenian'],
+    population: 847000,
+    flag: 'https://restcountries.eu/data/cyp.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Czech Republic',
+    capital: 'Prague',
+    languages: ['Czech', 'Slovak'],
+    population: 10558524,
+    flag: 'https://restcountries.eu/data/cze.svg',
+    currency: 'Czech koruna'
+  },
+  {
+    name: 'Denmark',
+    capital: 'Copenhagen',
+    languages: ['Danish'],
+    population: 5717014,
+    flag: 'https://restcountries.eu/data/dnk.svg',
+    currency: 'Danish krone'
+  },
+  {
+    name: 'Djibouti',
+    capital: 'Djibouti',
+    languages: ['French', 'Arabic'],
+    population: 900000,
+    flag: 'https://restcountries.eu/data/dji.svg',
+    currency: 'Djiboutian franc'
+  },
+  {
+    name: 'Dominica',
+    capital: 'Roseau',
+    languages: ['English'],
+    population: 71293,
+    flag: 'https://restcountries.eu/data/dma.svg',
+    currency: 'East Caribbean dollar'
+  },
+  {
+    name: 'Dominican Republic',
+    capital: 'Santo Domingo',
+    languages: ['Spanish'],
+    population: 10075045,
+    flag: 'https://restcountries.eu/data/dom.svg',
+    currency: 'Dominican peso'
+  },
+  {
+    name: 'Ecuador',
+    capital: 'Quito',
+    languages: ['Spanish'],
+    population: 16545799,
+    flag: 'https://restcountries.eu/data/ecu.svg',
+    currency: 'United States dollar'
+  },
+  {
+    name: 'Egypt',
+    capital: 'Cairo',
+    languages: ['Arabic'],
+    population: 91290000,
+    flag: 'https://restcountries.eu/data/egy.svg',
+    currency: 'Egyptian pound'
+  },
+  {
+    name: 'El Salvador',
+    capital: 'San Salvador',
+    languages: ['Spanish'],
+    population: 6520675,
+    flag: 'https://restcountries.eu/data/slv.svg',
+    currency: 'United States dollar'
+  },
+  {
+    name: 'Equatorial Guinea',
+    capital: 'Malabo',
+    languages: ['Spanish', 'French'],
+    population: 1222442,
+    flag: 'https://restcountries.eu/data/gnq.svg',
+    currency: 'Central African CFA franc'
+  },
+  {
+    name: 'Eritrea',
+    capital: 'Asmara',
+    languages: ['Tigrinya', 'Arabic', 'English'],
+    population: 5352000,
+    flag: 'https://restcountries.eu/data/eri.svg',
+    currency: 'Eritrean nakfa'
+  },
+  {
+    name: 'Estonia',
+    capital: 'Tallinn',
+    languages: ['Estonian'],
+    population: 1315944,
+    flag: 'https://restcountries.eu/data/est.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Ethiopia',
+    capital: 'Addis Ababa',
+    languages: ['Amharic'],
+    population: 92206005,
+    flag: 'https://restcountries.eu/data/eth.svg',
+    currency: 'Ethiopian birr'
+  },
+  {
+    name: 'Falkland Islands (Malvinas)',
+    capital: 'Stanley',
+    languages: ['English'],
+    population: 2563,
+    flag: 'https://restcountries.eu/data/flk.svg',
+    currency: 'Falkland Islands pound'
+  },
+  {
+    name: 'Faroe Islands',
+    capital: 'Tórshavn',
+    languages: ['Faroese'],
+    population: 49376,
+    flag: 'https://restcountries.eu/data/fro.svg',
+    currency: 'Danish krone'
+  },
+  {
+    name: 'Fiji',
+    capital: 'Suva',
+    languages: ['English', 'Fijian', 'Hindi', 'Urdu'],
+    population: 867000,
+    flag: 'https://restcountries.eu/data/fji.svg',
+    currency: 'Fijian dollar'
+  },
+  {
+    name: 'Finland',
+    capital: 'Helsinki',
+    languages: ['Finnish', 'Swedish'],
+    population: 5491817,
+    flag: 'https://restcountries.eu/data/fin.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'France',
+    capital: 'Paris',
+    languages: ['French'],
+    population: 66710000,
+    flag: 'https://restcountries.eu/data/fra.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'French Guiana',
+    capital: 'Cayenne',
+    languages: ['French'],
+    population: 254541,
+    flag: 'https://restcountries.eu/data/guf.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'French Polynesia',
+    capital: 'Papeetē',
+    languages: ['French'],
+    population: 271800,
+    flag: 'https://restcountries.eu/data/pyf.svg',
+    currency: 'CFP franc'
+  },
+  {
+    name: 'French Southern Territories',
+    capital: 'Port-aux-Français',
+    languages: ['French'],
+    population: 140,
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+  },
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+    flag: 'https://restcountries.eu/data/geo.svg',
+    currency: 'Georgian Lari'
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+    flag: 'https://restcountries.eu/data/deu.svg',
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+  },
+  {
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+    flag: 'https://restcountries.eu/data/gib.svg',
+    currency: 'Gibraltar pound'
+  },
+  {
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+    flag: 'https://restcountries.eu/data/grc.svg',
+    currency: 'Euro'
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+  {
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+    flag: 'https://restcountries.eu/data/grl.svg',
+    currency: 'Danish krone'
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+    flag: 'https://restcountries.eu/data/glp.svg',
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+    flag: 'https://restcountries.eu/data/gum.svg',
+    currency: 'United States dollar'
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+    flag: 'https://restcountries.eu/data/gtm.svg',
+    currency: 'Guatemalan quetzal'
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+    flag: 'https://restcountries.eu/data/ggy.svg',
+    currency: 'British pound'
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+    flag: 'https://restcountries.eu/data/gin.svg',
+    currency: 'Guinean franc'
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+    flag: 'https://restcountries.eu/data/gnb.svg',
+    currency: 'West African CFA franc'
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+  {
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+    flag: 'https://restcountries.eu/data/guy.svg',
+    currency: 'Guyanese dollar'
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+    population: 11078033,
+    flag: 'https://restcountries.eu/data/hti.svg',
+    currency: 'Haitian gourde'
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+  {
+    name: 'Heard Island and McDonald Islands',
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+    population: 451,
+    flag: 'https://restcountries.eu/data/vat.svg',
+    currency: 'Euro'
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+    flag: 'https://restcountries.eu/data/hnd.svg',
+    currency: 'Honduran lempira'
+  },
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+    flag: 'https://restcountries.eu/data/hkg.svg',
+    currency: 'Hong Kong dollar'
+  },
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+    languages: ['Hungarian'],
+    population: 9823000,
+    flag: 'https://restcountries.eu/data/hun.svg',
+    currency: 'Hungarian forint'
+  },
+  {
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+    flag: 'https://restcountries.eu/data/isl.svg',
+    currency: 'Icelandic króna'
+  },
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+    flag: 'https://restcountries.eu/data/ind.svg',
+    currency: 'Indian rupee'
+  },
+  {
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+    flag: 'https://restcountries.eu/data/idn.svg',
+    currency: 'Indonesian rupiah'
+  },
+  {
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+    languages: ['French'],
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+    flag: 'https://restcountries.eu/data/civ.svg',
+    currency: 'West African CFA franc'
+  },
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+    flag: 'https://restcountries.eu/data/irn.svg',
+    currency: 'Iranian rial'
+  },
+  {
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+    flag: 'https://restcountries.eu/data/irq.svg',
+    currency: 'Iraqi dinar'
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+    flag: 'https://restcountries.eu/data/irl.svg',
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+  {
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+    flag: 'https://restcountries.eu/data/imn.svg',
+    currency: 'British pound'
+  },
+  {
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+    flag: 'https://restcountries.eu/data/isr.svg',
+    currency: 'Israeli new shekel'
+  },
+  {
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+    flag: 'https://restcountries.eu/data/ita.svg',
+    currency: 'Euro'
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+    flag: 'https://restcountries.eu/data/jpn.svg',
+    currency: 'Japanese yen'
+  },
+  {
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+    flag: 'https://restcountries.eu/data/jey.svg',
+    currency: 'British pound'
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+    flag: 'https://restcountries.eu/data/jor.svg',
+    currency: 'Jordanian dinar'
+  },
+  {
+    name: 'Kazakhstan',
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+    languages: ['Kazakh', 'Russian'],
+    population: 17753200,
+    flag: 'https://restcountries.eu/data/kaz.svg',
+    currency: 'Kazakhstani tenge'
+  },
+  {
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+    languages: ['English', 'Swahili'],
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+    flag: 'https://restcountries.eu/data/ken.svg',
+    currency: 'Kenyan shilling'
+  },
+  {
+    name: 'Kiribati',
+    capital: 'South Tarawa',
+    languages: ['English'],
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+    flag: 'https://restcountries.eu/data/kir.svg',
+    currency: 'Australian dollar'
+  },
+  {
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+    languages: ['Arabic'],
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+    flag: 'https://restcountries.eu/data/kwt.svg',
+    currency: 'Kuwaiti dinar'
+  },
+  {
+    name: 'Kyrgyzstan',
+    capital: 'Bishkek',
+    languages: ['Kyrgyz', 'Russian'],
+    population: 6047800,
+    flag: 'https://restcountries.eu/data/kgz.svg',
+    currency: 'Kyrgyzstani som'
+  },
+  {
+    name: "Lao People's Democratic Republic",
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+    languages: ['Lao'],
+    population: 6492400,
+    flag: 'https://restcountries.eu/data/lao.svg',
+    currency: 'Lao kip'
+  },
+  {
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+    population: 1961600,
+    flag: 'https://restcountries.eu/data/lva.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Lebanon',
+    capital: 'Beirut',
+    languages: ['Arabic', 'French'],
+    population: 5988000,
+    flag: 'https://restcountries.eu/data/lbn.svg',
+    currency: 'Lebanese pound'
+  },
+  {
+    name: 'Lesotho',
+    capital: 'Maseru',
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+    flag: 'https://restcountries.eu/data/lso.svg',
+    currency: 'Lesotho loti'
+  },
+  {
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+    capital: 'Monrovia',
+    languages: ['English'],
+    population: 4615000,
+    flag: 'https://restcountries.eu/data/lbr.svg',
+    currency: 'Liberian dollar'
+  },
+  {
+    name: 'Libya',
+    capital: 'Tripoli',
+    languages: ['Arabic'],
+    population: 6385000,
+    flag: 'https://restcountries.eu/data/lby.svg',
+    currency: 'Libyan dinar'
+  },
+  {
+    name: 'Liechtenstein',
+    capital: 'Vaduz',
+    languages: ['German'],
+    population: 37623,
+    flag: 'https://restcountries.eu/data/lie.svg',
+    currency: 'Swiss franc'
+  },
+  {
+    name: 'Lithuania',
+    capital: 'Vilnius',
+    languages: ['Lithuanian'],
+    population: 2872294,
+    flag: 'https://restcountries.eu/data/ltu.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Luxembourg',
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+    languages: ['French', 'German', 'Luxembourgish'],
+    population: 576200,
+    flag: 'https://restcountries.eu/data/lux.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Macao',
+    capital: '',
+    languages: ['Chinese', 'Portuguese'],
+    population: 649100,
+    flag: 'https://restcountries.eu/data/mac.svg',
+    currency: 'Macanese pataca'
+  },
+  {
+    name: 'Macedonia (the former Yugoslav Republic of)',
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+    languages: ['Macedonian'],
+    population: 2058539,
+    flag: 'https://restcountries.eu/data/mkd.svg',
+    currency: 'Macedonian denar'
+  },
+  {
+    name: 'Madagascar',
+    capital: 'Antananarivo',
+    languages: ['French', 'Malagasy'],
+    population: 22434363,
+    flag: 'https://restcountries.eu/data/mdg.svg',
+    currency: 'Malagasy ariary'
+  },
+  {
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+    languages: ['English', 'Chichewa'],
+    population: 16832910,
+    flag: 'https://restcountries.eu/data/mwi.svg',
+    currency: 'Malawian kwacha'
+  },
+  {
+    name: 'Malaysia',
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+    languages: ['Malaysian'],
+    population: 31405416,
+    flag: 'https://restcountries.eu/data/mys.svg',
+    currency: 'Malaysian ringgit'
+  },
+  {
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+    capital: 'Malé',
+    languages: ['Divehi'],
+    population: 344023,
+    flag: 'https://restcountries.eu/data/mdv.svg',
+    currency: 'Maldivian rufiyaa'
+  },
+  {
+    name: 'Mali',
+    capital: 'Bamako',
+    languages: ['French'],
+    population: 18135000,
+    flag: 'https://restcountries.eu/data/mli.svg',
+    currency: 'West African CFA franc'
+  },
+  {
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+    languages: ['Maltese', 'English'],
+    population: 425384,
+    flag: 'https://restcountries.eu/data/mlt.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Marshall Islands',
+    capital: 'Majuro',
+    languages: ['English', 'Marshallese'],
+    population: 54880,
+    flag: 'https://restcountries.eu/data/mhl.svg',
+    currency: 'United States dollar'
+  },
+  {
+    name: 'Martinique',
+    capital: 'Fort-de-France',
+    languages: ['French'],
+    population: 378243,
+    flag: 'https://restcountries.eu/data/mtq.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Mauritania',
+    capital: 'Nouakchott',
+    languages: ['Arabic'],
+    population: 3718678,
+    flag: 'https://restcountries.eu/data/mrt.svg',
+    currency: 'Mauritanian ouguiya'
+  },
+  {
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+    languages: ['English'],
+    population: 1262879,
+    flag: 'https://restcountries.eu/data/mus.svg',
+    currency: 'Mauritian rupee'
+  },
+  {
+    name: 'Mayotte',
+    capital: 'Mamoudzou',
+    languages: ['French'],
+    population: 226915,
+    flag: 'https://restcountries.eu/data/myt.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Mexico',
+    capital: 'Mexico City',
+    languages: ['Spanish'],
+    population: 122273473,
+    flag: 'https://restcountries.eu/data/mex.svg',
+    currency: 'Mexican peso'
+  },
+  {
+    name: 'Micronesia (Federated States of)',
+    capital: 'Palikir',
+    languages: ['English'],
+    population: 102800,
+    flag: 'https://restcountries.eu/data/fsm.svg',
+    currency: '[D]'
+  },
+  {
+    name: 'Moldova (Republic of)',
+    capital: 'Chișinău',
+    languages: ['Romanian'],
+    population: 3553100,
+    flag: 'https://restcountries.eu/data/mda.svg',
+    currency: 'Moldovan leu'
+  },
+  {
+    name: 'Monaco',
+    capital: 'Monaco',
+    languages: ['French'],
+    population: 38400,
+    flag: 'https://restcountries.eu/data/mco.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Mongolia',
+    capital: 'Ulan Bator',
+    languages: ['Mongolian'],
+    population: 3093100,
+    flag: 'https://restcountries.eu/data/mng.svg',
+    currency: 'Mongolian tögrög'
+  },
+  {
+    name: 'Montenegro',
+    capital: 'Podgorica',
+    languages: ['Serbian', 'Bosnian', 'Albanian', 'Croatian'],
+    population: 621810,
+    flag: 'https://restcountries.eu/data/mne.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Montserrat',
+    capital: 'Plymouth',
+    languages: ['English'],
+    population: 4922,
+    flag: 'https://restcountries.eu/data/msr.svg',
+    currency: 'East Caribbean dollar'
+  },
+  {
+    name: 'Morocco',
+    capital: 'Rabat',
+    languages: ['Arabic'],
+    population: 33337529,
+    flag: 'https://restcountries.eu/data/mar.svg',
+    currency: 'Moroccan dirham'
+  },
+  {
+    name: 'Mozambique',
+    capital: 'Maputo',
+    languages: ['Portuguese'],
+    population: 26423700,
+    flag: 'https://restcountries.eu/data/moz.svg',
+    currency: 'Mozambican metical'
+  },
+  {
+    name: 'Myanmar',
+    capital: 'Naypyidaw',
+    languages: ['Burmese'],
+    population: 51419420,
+    flag: 'https://restcountries.eu/data/mmr.svg',
+    currency: 'Burmese kyat'
+  },
+  {
+    name: 'Namibia',
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+    languages: ['English', 'Afrikaans'],
+    population: 2324388,
+    flag: 'https://restcountries.eu/data/nam.svg',
+    currency: 'Namibian dollar'
+  },
+  {
+    name: 'Nauru',
+    capital: 'Yaren',
+    languages: ['English', 'Nauruan'],
+    population: 10084,
+    flag: 'https://restcountries.eu/data/nru.svg',
+    currency: 'Australian dollar'
+  },
+  {
+    name: 'Nepal',
+    capital: 'Kathmandu',
+    languages: ['Nepali'],
+    population: 28431500,
+    flag: 'https://restcountries.eu/data/npl.svg',
+    currency: 'Nepalese rupee'
+  },
+  {
+    name: 'Netherlands',
+    capital: 'Amsterdam',
+    languages: ['Dutch'],
+    population: 17019800,
+    flag: 'https://restcountries.eu/data/nld.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'New Caledonia',
+    capital: 'Nouméa',
+    languages: ['French'],
+    population: 268767,
+    flag: 'https://restcountries.eu/data/ncl.svg',
+    currency: 'CFP franc'
+  },
+  {
+    name: 'New Zealand',
+    capital: 'Wellington',
+    languages: ['English', 'Māori'],
+    population: 4697854,
+    flag: 'https://restcountries.eu/data/nzl.svg',
+    currency: 'New Zealand dollar'
+  },
+  {
+    name: 'Nicaragua',
+    capital: 'Managua',
+    languages: ['Spanish'],
+    population: 6262703,
+    flag: 'https://restcountries.eu/data/nic.svg',
+    currency: 'Nicaraguan córdoba'
+  },
+  {
+    name: 'Niger',
+    capital: 'Niamey',
+    languages: ['French'],
+    population: 20715000,
+    flag: 'https://restcountries.eu/data/ner.svg',
+    currency: 'West African CFA franc'
+  },
+  {
+    name: 'Nigeria',
+    capital: 'Abuja',
+    languages: ['English'],
+    population: 186988000,
+    flag: 'https://restcountries.eu/data/nga.svg',
+    currency: 'Nigerian naira'
+  },
+  {
+    name: 'Niue',
+    capital: 'Alofi',
+    languages: ['English'],
+    population: 1470,
+    flag: 'https://restcountries.eu/data/niu.svg',
+    currency: 'New Zealand dollar'
+  },
+  {
+    name: 'Norfolk Island',
+    capital: 'Kingston',
+    languages: ['English'],
+    population: 2302,
+    flag: 'https://restcountries.eu/data/nfk.svg',
+    currency: 'Australian dollar'
+  },
+  {
+    name: "Korea (Democratic People's Republic of)",
+    capital: 'Pyongyang',
+    languages: ['Korean'],
+    population: 25281000,
+    flag: 'https://restcountries.eu/data/prk.svg',
+    currency: 'North Korean won'
+  },
+  {
+    name: 'Northern Mariana Islands',
+    capital: 'Saipan',
+    languages: ['English', 'Chamorro'],
+    population: 56940,
+    flag: 'https://restcountries.eu/data/mnp.svg',
+    currency: 'United States dollar'
+  },
+  {
+    name: 'Norway',
+    capital: 'Oslo',
+    languages: ['Norwegian', 'Norwegian Bokmål', 'Norwegian Nynorsk'],
+    population: 5223256,
+    flag: 'https://restcountries.eu/data/nor.svg',
+    currency: 'Norwegian krone'
+  },
+  {
+    name: 'Oman',
+    capital: 'Muscat',
+    languages: ['Arabic'],
+    population: 4420133,
+    flag: 'https://restcountries.eu/data/omn.svg',
+    currency: 'Omani rial'
+  },
+  {
+    name: 'Pakistan',
+    capital: 'Islamabad',
+    languages: ['English', 'Urdu'],
+    population: 194125062,
+    flag: 'https://restcountries.eu/data/pak.svg',
+    currency: 'Pakistani rupee'
+  },
+  {
+    name: 'Palau',
+    capital: 'Ngerulmud',
+    languages: ['English'],
+    population: 17950,
+    flag: 'https://restcountries.eu/data/plw.svg',
+    currency: '[E]'
+  },
+  {
+    name: 'Palestine, State of',
+    capital: 'Ramallah',
+    languages: ['Arabic'],
+    population: 4682467,
+    flag: 'https://restcountries.eu/data/pse.svg',
+    currency: 'Israeli new sheqel'
+  },
+  {
+    name: 'Panama',
+    capital: 'Panama City',
+    languages: ['Spanish'],
+    population: 3814672,
+    flag: 'https://restcountries.eu/data/pan.svg',
+    currency: 'Panamanian balboa'
+  },
+  {
+    name: 'Papua New Guinea',
+    capital: 'Port Moresby',
+    languages: ['English'],
+    population: 8083700,
+    flag: 'https://restcountries.eu/data/png.svg',
+    currency: 'Papua New Guinean kina'
+  },
+  {
+    name: 'Paraguay',
+    capital: 'Asunción',
+    languages: ['Spanish', 'Guaraní'],
+    population: 6854536,
+    flag: 'https://restcountries.eu/data/pry.svg',
+    currency: 'Paraguayan guaraní'
+  },
+  {
+    name: 'Peru',
+    capital: 'Lima',
+    languages: ['Spanish'],
+    population: 31488700,
+    flag: 'https://restcountries.eu/data/per.svg',
+    currency: 'Peruvian sol'
+  },
+  {
+    name: 'Philippines',
+    capital: 'Manila',
+    languages: ['English'],
+    population: 103279800,
+    flag: 'https://restcountries.eu/data/phl.svg',
+    currency: 'Philippine peso'
+  },
+  {
+    name: 'Pitcairn',
+    capital: 'Adamstown',
+    languages: ['English'],
+    population: 56,
+    flag: 'https://restcountries.eu/data/pcn.svg',
+    currency: 'New Zealand dollar'
+  },
+  {
+    name: 'Poland',
+    capital: 'Warsaw',
+    languages: ['Polish'],
+    population: 38437239,
+    flag: 'https://restcountries.eu/data/pol.svg',
+    currency: 'Polish złoty'
+  },
+  {
+    name: 'Portugal',
+    capital: 'Lisbon',
+    languages: ['Portuguese'],
+    population: 10374822,
+    flag: 'https://restcountries.eu/data/prt.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Puerto Rico',
+    capital: 'San Juan',
+    languages: ['Spanish', 'English'],
+    population: 3474182,
+    flag: 'https://restcountries.eu/data/pri.svg',
+    currency: 'United States dollar'
+  },
+  {
+    name: 'Qatar',
+    capital: 'Doha',
+    languages: ['Arabic'],
+    population: 2587564,
+    flag: 'https://restcountries.eu/data/qat.svg',
+    currency: 'Qatari riyal'
+  },
+  {
+    name: 'Republic of Kosovo',
+    capital: 'Pristina',
+    languages: ['Albanian', 'Serbian'],
+    population: 1733842,
+    flag: 'https://restcountries.eu/data/kos.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Réunion',
+    capital: 'Saint-Denis',
+    languages: ['French'],
+    population: 840974,
+    flag: 'https://restcountries.eu/data/reu.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Romania',
+    capital: 'Bucharest',
+    languages: ['Romanian'],
+    population: 19861408,
+    flag: 'https://restcountries.eu/data/rou.svg',
+    currency: 'Romanian leu'
+  },
+  {
+    name: 'Russian Federation',
+    capital: 'Moscow',
+    languages: ['Russian'],
+    population: 146599183,
+    flag: 'https://restcountries.eu/data/rus.svg',
+    currency: 'Russian ruble'
+  },
+  {
+    name: 'Rwanda',
+    capital: 'Kigali',
+    languages: ['Kinyarwanda', 'English', 'French'],
+    population: 11553188,
+    flag: 'https://restcountries.eu/data/rwa.svg',
+    currency: 'Rwandan franc'
+  },
+  {
+    name: 'Saint Barthélemy',
+    capital: 'Gustavia',
+    languages: ['French'],
+    population: 9417,
+    flag: 'https://restcountries.eu/data/blm.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Saint Helena, Ascension and Tristan da Cunha',
+    capital: 'Jamestown',
+    languages: ['English'],
+    population: 4255,
+    flag: 'https://restcountries.eu/data/shn.svg',
+    currency: 'Saint Helena pound'
+  },
+  {
+    name: 'Saint Kitts and Nevis',
+    capital: 'Basseterre',
+    languages: ['English'],
+    population: 46204,
+    flag: 'https://restcountries.eu/data/kna.svg',
+    currency: 'East Caribbean dollar'
+  },
+  {
+    name: 'Saint Lucia',
+    capital: 'Castries',
+    languages: ['English'],
+    population: 186000,
+    flag: 'https://restcountries.eu/data/lca.svg',
+    currency: 'East Caribbean dollar'
+  },
+  {
+    name: 'Saint Martin (French part)',
+    capital: 'Marigot',
+    languages: ['English', 'French', 'Dutch'],
+    population: 36979,
+    flag: 'https://restcountries.eu/data/maf.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Saint Pierre and Miquelon',
+    capital: 'Saint-Pierre',
+    languages: ['French'],
+    population: 6069,
+    flag: 'https://restcountries.eu/data/spm.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Saint Vincent and the Grenadines',
+    capital: 'Kingstown',
+    languages: ['English'],
+    population: 109991,
+    flag: 'https://restcountries.eu/data/vct.svg',
+    currency: 'East Caribbean dollar'
+  },
+  {
+    name: 'Samoa',
+    capital: 'Apia',
+    languages: ['Samoan', 'English'],
+    population: 194899,
+    flag: 'https://restcountries.eu/data/wsm.svg',
+    currency: 'Samoan tālā'
+  },
+  {
+    name: 'San Marino',
+    capital: 'City of San Marino',
+    languages: ['Italian'],
+    population: 33005,
+    flag: 'https://restcountries.eu/data/smr.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Sao Tome and Principe',
+    capital: 'São Tomé',
+    languages: ['Portuguese'],
+    population: 187356,
+    flag: 'https://restcountries.eu/data/stp.svg',
+    currency: 'São Tomé and Príncipe dobra'
+  },
+  {
+    name: 'Saudi Arabia',
+    capital: 'Riyadh',
+    languages: ['Arabic'],
+    population: 32248200,
+    flag: 'https://restcountries.eu/data/sau.svg',
+    currency: 'Saudi riyal'
+  },
+  {
+    name: 'Senegal',
+    capital: 'Dakar',
+    languages: ['French'],
+    population: 14799859,
+    flag: 'https://restcountries.eu/data/sen.svg',
+    currency: 'West African CFA franc'
+  },
+  {
+    name: 'Serbia',
+    capital: 'Belgrade',
+    languages: ['Serbian'],
+    population: 7076372,
+    flag: 'https://restcountries.eu/data/srb.svg',
+    currency: 'Serbian dinar'
+  },
+  {
+    name: 'Seychelles',
+    capital: 'Victoria',
+    languages: ['French', 'English'],
+    population: 91400,
+    flag: 'https://restcountries.eu/data/syc.svg',
+    currency: 'Seychellois rupee'
+  },
+  {
+    name: 'Sierra Leone',
+    capital: 'Freetown',
+    languages: ['English'],
+    population: 7075641,
+    flag: 'https://restcountries.eu/data/sle.svg',
+    currency: 'Sierra Leonean leone'
+  },
+  {
+    name: 'Singapore',
+    capital: 'Singapore',
+    languages: ['English', 'Malay', 'Tamil', 'Chinese'],
+    population: 5535000,
+    flag: 'https://restcountries.eu/data/sgp.svg',
+    currency: 'Brunei dollar'
+  },
+  {
+    name: 'Sint Maarten (Dutch part)',
+    capital: 'Philipsburg',
+    languages: ['Dutch', 'English'],
+    population: 38247,
+    flag: 'https://restcountries.eu/data/sxm.svg',
+    currency: 'Netherlands Antillean guilder'
+  },
+  {
+    name: 'Slovakia',
+    capital: 'Bratislava',
+    languages: ['Slovak'],
+    population: 5426252,
+    flag: 'https://restcountries.eu/data/svk.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Slovenia',
+    capital: 'Ljubljana',
+    languages: ['Slovene'],
+    population: 2064188,
+    flag: 'https://restcountries.eu/data/svn.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Solomon Islands',
+    capital: 'Honiara',
+    languages: ['English'],
+    population: 642000,
+    flag: 'https://restcountries.eu/data/slb.svg',
+    currency: 'Solomon Islands dollar'
+  },
+  {
+    name: 'Somalia',
+    capital: 'Mogadishu',
+    languages: ['Somali', 'Arabic'],
+    population: 11079000,
+    flag: 'https://restcountries.eu/data/som.svg',
+    currency: 'Somali shilling'
+  },
+  {
+    name: 'South Africa',
+    capital: 'Pretoria',
+    languages: [
+      'Afrikaans',
+      'English',
+      'Southern Ndebele',
+      'Southern Sotho',
+      'Swati',
+      'Tswana',
+      'Tsonga',
+      'Venda',
+      'Xhosa',
+      'Zulu'
+    ],
+    population: 55653654,
+    flag: 'https://restcountries.eu/data/zaf.svg',
+    currency: 'South African rand'
+  },
+  {
+    name: 'South Georgia and the South Sandwich Islands',
+    capital: 'King Edward Point',
+    languages: ['English'],
+    population: 30,
+    flag: 'https://restcountries.eu/data/sgs.svg',
+    currency: 'British pound'
+  },
+  {
+    name: 'Korea (Republic of)',
+    capital: 'Seoul',
+    languages: ['Korean'],
+    population: 50801405,
+    flag: 'https://restcountries.eu/data/kor.svg',
+    currency: 'South Korean won'
+  },
+  {
+    name: 'South Sudan',
+    capital: 'Juba',
+    languages: ['English'],
+    population: 12131000,
+    flag: 'https://restcountries.eu/data/ssd.svg',
+    currency: 'South Sudanese pound'
+  },
+  {
+    name: 'Spain',
+    capital: 'Madrid',
+    languages: ['Spanish'],
+    population: 46438422,
+    flag: 'https://restcountries.eu/data/esp.svg',
+    currency: 'Euro'
+  },
+  {
+    name: 'Sri Lanka',
+    capital: 'Colombo',
+    languages: ['Sinhalese', 'Tamil'],
+    population: 20966000,
+    flag: 'https://restcountries.eu/data/lka.svg',
+    currency: 'Sri Lankan rupee'
+  },
+  {
+    name: 'Sudan',
+    capital: 'Khartoum',
+    languages: ['Arabic', 'English'],
+    population: 39598700,
+    flag: 'https://restcountries.eu/data/sdn.svg',
+    currency: 'Sudanese pound'
+  },
+  {
+    name: 'Suriname',
+    capital: 'Paramaribo',
+    languages: ['Dutch'],
+    population: 541638,
+    flag: 'https://restcountries.eu/data/sur.svg',
+    currency: 'Surinamese dollar'
+  },
+  {
+    name: 'Svalbard and Jan Mayen',
+    capital: 'Longyearbyen',
+    languages: ['Norwegian'],
+    population: 2562,
+    flag: 'https://restcountries.eu/data/sjm.svg',
+    currency: 'Norwegian krone'
+  },
+  {
+    name: 'Swaziland',
+    capital: 'Lobamba',
+    languages: ['English', 'Swati'],
+    population: 1132657,
+    flag: 'https://restcountries.eu/data/swz.svg',
+    currency: 'Swazi lilangeni'
+  },
+  {
+    name: 'Sweden',
+    capital: 'Stockholm',
+    languages: ['Swedish'],
+    population: 9894888,
+    flag: 'https://restcountries.eu/data/swe.svg',
+    currency: 'Swedish krona'
+  },
+  {
+    name: 'Switzerland',
+    capital: 'Bern',
+    languages: ['German', 'French', 'Italian'],
+    population: 8341600,
+    flag: 'https://restcountries.eu/data/che.svg',
+    currency: 'Swiss franc'
+  },
+  {
+    name: 'Syrian Arab Republic',
+    capital: 'Damascus',
+    languages: ['Arabic'],
+    population: 18564000,
+    flag: 'https://restcountries.eu/data/syr.svg',
+    currency: 'Syrian pound'
+  },
+  {
+    name: 'Taiwan',
+    capital: 'Taipei',
+    languages: ['Chinese'],
+    population: 23503349,
+    flag: 'https://restcountries.eu/data/twn.svg',
+    currency: 'New Taiwan dollar'
+  },
+  {
+    name: 'Tajikistan',
+    capital: 'Dushanbe',
+    languages: ['Tajik', 'Russian'],
+    population: 8593600,
+    flag: 'https://restcountries.eu/data/tjk.svg',
+    currency: 'Tajikistani somoni'
+  },
+  {
+    name: 'Tanzania, United Republic of',
+    capital: 'Dodoma',
+    languages: ['Swahili', 'English'],
+    population: 55155000,
+    flag: 'https://restcountries.eu/data/tza.svg',
+    currency: 'Tanzanian shilling'
+  },
+  {
+    name: 'Thailand',
+    capital: 'Bangkok',
+    languages: ['Thai'],
+    population: 65327652,
+    flag: 'https://restcountries.eu/data/tha.svg',
+    currency: 'Thai baht'
+  },
+  {
+    name: 'Timor-Leste',
+    capital: 'Dili',
+    languages: ['Portuguese'],
+    population: 1167242,
+    flag: 'https://restcountries.eu/data/tls.svg',
+    currency: 'United States dollar'
+  },
+  {
+    name: 'Togo',
+    capital: 'Lomé',
+    languages: ['French'],
+    population: 7143000,
+    flag: 'https://restcountries.eu/data/tgo.svg',
+    currency: 'West African CFA franc'
+  },
+  {
+    name: 'Tokelau',
+    capital: 'Fakaofo',
+    languages: ['English'],
+    population: 1411,
+    flag: 'https://restcountries.eu/data/tkl.svg',
+    currency: 'New Zealand dollar'
+  },
+  {
+    name: 'Tonga',
+    capital: "Nuku'alofa",
+    languages: ['English', 'Tonga (Tonga Islands)'],
+    population: 103252,
+    flag: 'https://restcountries.eu/data/ton.svg',
+    currency: 'Tongan paʻanga'
+  },
+  {
+    name: 'Trinidad and Tobago',
+    capital: 'Port of Spain',
+    languages: ['English'],
+    population: 1349667,
+    flag: 'https://restcountries.eu/data/tto.svg',
+    currency: 'Trinidad and Tobago dollar'
+  },
+  {
+    name: 'Tunisia',
+    capital: 'Tunis',
+    languages: ['Arabic'],
+    population: 11154400,
+    flag: 'https://restcountries.eu/data/tun.svg',
+    currency: 'Tunisian dinar'
+  },
+  {
+    name: 'Turkey',
+    capital: 'Ankara',
+    languages: ['Turkish'],
+    population: 78741053,
+    flag: 'https://restcountries.eu/data/tur.svg',
+    currency: 'Turkish lira'
+  },
+  {
+    name: 'Turkmenistan',
+    capital: 'Ashgabat',
+    languages: ['Turkmen', 'Russian'],
+    population: 4751120,
+    flag: 'https://restcountries.eu/data/tkm.svg',
+    currency: 'Turkmenistan manat'
+  },
+  {
+    name: 'Turks and Caicos Islands',
+    capital: 'Cockburn Town',
+    languages: ['English'],
+    population: 31458,
+    flag: 'https://restcountries.eu/data/tca.svg',
+    currency: 'United States dollar'
+  },
+  {
+    name: 'Tuvalu',
+    capital: 'Funafuti',
+    languages: ['English'],
+    population: 10640,
+    flag: 'https://restcountries.eu/data/tuv.svg',
+    currency: 'Australian dollar'
+  },
+  {
+    name: 'Uganda',
+    capital: 'Kampala',
+    languages: ['English', 'Swahili'],
+    population: 33860700,
+    flag: 'https://restcountries.eu/data/uga.svg',
+    currency: 'Ugandan shilling'
+  },
+  {
+    name: 'Ukraine',
+    capital: 'Kiev',
+    languages: ['Ukrainian'],
+    population: 42692393,
+    flag: 'https://restcountries.eu/data/ukr.svg',
+    currency: 'Ukrainian hryvnia'
+  },
+  {
+    name: 'United Arab Emirates',
+    capital: 'Abu Dhabi',
+    languages: ['Arabic'],
+    population: 9856000,
+    flag: 'https://restcountries.eu/data/are.svg',
+    currency: 'United Arab Emirates dirham'
+  },
+  {
+    name: 'United Kingdom of Great Britain and Northern Ireland',
+    capital: 'London',
+    languages: ['English'],
+    population: 65110000,
+    flag: 'https://restcountries.eu/data/gbr.svg',
+    currency: 'British pound'
+  },
+  {
+    name: 'United States of America',
+    capital: 'Washington, D.C.',
+    languages: ['English'],
+    population: 323947000,
+    flag: 'https://restcountries.eu/data/usa.svg',
+    currency: 'United States dollar'
+  },
+  {
+    name: 'Uruguay',
+    capital: 'Montevideo',
+    languages: ['Spanish'],
+    population: 3480222,
+    flag: 'https://restcountries.eu/data/ury.svg',
+    currency: 'Uruguayan peso'
+  },
+  {
+    name: 'Uzbekistan',
+    capital: 'Tashkent',
+    languages: ['Uzbek', 'Russian'],
+    population: 31576400,
+    flag: 'https://restcountries.eu/data/uzb.svg',
+    currency: "Uzbekistani so'm"
+  },
+  {
+    name: 'Vanuatu',
+    capital: 'Port Vila',
+    languages: ['Bislama', 'English', 'French'],
+    population: 277500,
+    flag: 'https://restcountries.eu/data/vut.svg',
+    currency: 'Vanuatu vatu'
+  },
+  {
+    name: 'Venezuela (Bolivarian Republic of)',
+    capital: 'Caracas',
+    languages: ['Spanish'],
+    population: 31028700,
+    flag: 'https://restcountries.eu/data/ven.svg',
+    currency: 'Venezuelan bolívar'
+  },
+  {
+    name: 'Viet Nam',
+    capital: 'Hanoi',
+    languages: ['Vietnamese'],
+    population: 92700000,
+    flag: 'https://restcountries.eu/data/vnm.svg',
+    currency: 'Vietnamese đồng'
+  },
+  {
+    name: 'Wallis and Futuna',
+    capital: 'Mata-Utu',
+    languages: ['French'],
+    population: 11750,
+    flag: 'https://restcountries.eu/data/wlf.svg',
+    currency: 'CFP franc'
+  },
+  {
+    name: 'Western Sahara',
+    capital: 'El Aaiún',
+    languages: ['Spanish'],
+    population: 510713,
+    flag: 'https://restcountries.eu/data/esh.svg',
+    currency: 'Moroccan dirham'
+  },
+  {
+    name: 'Yemen',
+    capital: "Sana'a",
+    languages: ['Arabic'],
+    population: 27478000,
+    flag: 'https://restcountries.eu/data/yem.svg',
+    currency: 'Yemeni rial'
+  },
+  {
+    name: 'Zambia',
+    capital: 'Lusaka',
+    languages: ['English'],
+    population: 15933883,
+    flag: 'https://restcountries.eu/data/zmb.svg',
+    currency: 'Zambian kwacha'
+  },
+  {
+    name: 'Zimbabwe',
+    capital: 'Harare',
+    languages: ['English', 'Shona', 'Northern Ndebele'],
+    population: 14240168,
+    flag: 'https://restcountries.eu/data/zwe.svg',
+    currency: 'Botswana pula'
+  }
+]
diff --git a/15_Day/15_day_starter/index.html b/15_Day/15_day_starter/index.html
new file mode 100644
index 0000000..db149cc
--- /dev/null
+++ b/15_Day/15_day_starter/index.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+    <title>30DaysOfJavaScript:15 Day </title>
+</head>
+
+<body>
+    <h1>30DaysOfJavaScript:15 Day</h1>
+    <h2>Classes</h2>
+
+    <script src="./data/countries_data.js"></script>
+    <script src="./scripts/main.js"></script>
+
+</body>
+
+</html>
\ No newline at end of file
diff --git a/15_Day/15_day_starter/scripts/main.js b/15_Day/15_day_starter/scripts/main.js
new file mode 100644
index 0000000..4e66495
--- /dev/null
+++ b/15_Day/15_day_starter/scripts/main.js
@@ -0,0 +1,105 @@
+
+
+class Person {
+  constructor(firstName, lastName, age, country, city) {
+    this.firstName = firstName
+    this.lastName = lastName
+    this.age = age
+    this.country = country
+    this.city = city
+    this.score = 0
+    this.skills = []
+  }
+  getFullName() {
+    const fullName = this.firstName + ' ' + this.lastName
+    return fullName
+  }
+  get getScore() {
+    return this.score
+  }
+  get getSkills() {
+    return this.skills
+  }
+  set setScore(score) {
+    this.score += score
+  }
+  set setSkill(skill) {
+    this.skills.push(skill)
+  }
+  getPersonInfo() {
+    let fullName = this.getFullName()
+    let skills =
+      this.skills.length > 0 &&
+      this.skills.slice(0, this.skills.length - 1).join(', ') +
+        ` and ${this.skills[this.skills.length - 1]}`
+
+    let formattedSkills = skills ? `He knows ${skills}` : ''
+
+    let info = `${fullName} is ${this.age}. He lives ${this.city}, ${this.country}. ${formattedSkills}`
+    console.log(this)
+    return info
+  }
+  static favoriteSkill() {
+    const skills = ['HTML', 'CSS', 'JS', 'React', 'Python', 'Node']
+    const index = Math.floor(Math.random() * skills.length)
+    console.log('hi')
+    return skills[index]
+  }
+}
+
+console.log(Person.favoriteSkill())
+
+class Student extends Person {
+  constructor(firstName, lastName, age, country, city, gender) {
+    super(firstName, lastName, age, country, city)
+    this.gender = gender
+  }
+
+  saySomething() {
+    console.log('I am a child of the person class')
+  }
+  getPersonInfo() {
+    let fullName = this.getFullName()
+    let skills =
+      this.skills.length > 0 &&
+      this.skills.slice(0, this.skills.length - 1).join(', ') +
+        ` and ${this.skills[this.skills.length - 1]}`
+
+    let formattedSkills = skills ? `He knows ${skills}` : ''
+    let pronoun = this.gender == 'Male' ? 'He' : 'She'
+
+    let info = `${fullName} is ${this.age}. ${pronoun} lives in ${this.city}, ${this.country}. ${formattedSkills}`
+    console.log(this)
+    return info
+  }
+}
+
+const s1 = new Student(
+  'Asabeneh',
+  'Yetayeh',
+  250,
+  'Finland',
+  'Helsinki',
+  'Male'
+)
+const s2 = new Student('Lidiya', 'Tekle', 28, 'Finland', 'Helsinki', 'Female')
+s1.setScore = 1
+s1.setSkill = 'HTML'
+s1.setSkill = 'CSS'
+s1.setSkill = 'JavaScript'
+
+s2.setScore = 1
+s2.setSkill = 'Planning'
+s2.setSkill = 'Managing'
+s2.setSkill = 'Organizing'
+
+console.log(s1)
+console.log(s2)
+
+console.log(s1.saySomething())
+console.log(s1.getFullName())
+console.log(s1.getPersonInfo())
+
+console.log(s2.saySomething())
+console.log(s2.getFullName())
+console.log(s2.getPersonInfo())
\ No newline at end of file