using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}

​

public interface IHaveAnimalInstinct

{

    void TriggerInstinct();

}

​

public interface IDomasticAnimal

{

    void BeFriendly();

}   

​

public class Kottan : IHaveAnimalInstinct, IDomasticAnimal

{

    public void TriggerInstinct() {}

    public void BeFriendly() {}

}