using System;

public class Program

{

    public class Animal {

        public string Species { get; set; }

        public string Sound { get; set; }

        public virtual void Speak() {

            Console.WriteLine("The " + Species + " says " + Sound + ".");

        }

    }

    public class Dog : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Woof ");

    }

    }

​

    public class Cat : Animal

    {

        public override void Speak() {

            Console.WriteLine("Meow ");

    }

    }

    public class Lion : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Roar ");

    }

    }

    public class Horse : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Neigh ");

    }

    }

    public class Duck : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Quack ");

    }

    }

    public class Sheep : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Baa ");

    }

    }

    public class Frog : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Ribbit ");

    }

    }

    public class Monkey : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Ooh Aah ");

    }

    }

    public class Cow : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Moo ");

    }

    }

    public class Chicken : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Cluck ");

    }

    }

    public class Rooster : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Cockadoodle Doo ");

    }

    }

    public class Bee : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Buzz ");

    }

    }

    public class Snake : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Hiss ");

    }

    }

    public class Bear : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Grr ");

    }

    }

    public class Owl : Animal 

    {

        public override void Speak() {

            Console.WriteLine("Hoot ");

    }

    }

    public static void Main(string[] args)

    {

            Dog dog = new Dog();

            dog.Speak();

            Cat cat = new Cat();

            cat.Speak();

            Lion lion = new Lion();

            lion.Speak();

            Horse horse = new Horse();

            horse.Speak();

            Duck duck = new Duck();

            duck.Speak();

            Sheep sheep = new Sheep();

            sheep.Speak();

            Frog frog = new Frog();

            frog.Speak();

            Monkey monkey = new Monkey();

            monkey.Speak();

            Cow cow = new Cow();

            cow.Speak();

            Chicken chicken = new Chicken();

            chicken.Speak();

            Rooster rooster = new Rooster();

            rooster.Speak();

            Bee bee = new Bee();

            bee.Speak();

            Snake snake = new Snake();

            snake.Speak();

            Bear bear = new Bear();

            bear.Speak();

            Owl owl = new Owl();

            owl.Speak();

        }

}

​

​

​