using System;

​

public interface INerfGun

{

    string shoot();

}

​

public class AmadeusGun : INerfGun

{

    public string shoot()

    {

        return "Amadeu, shoot Jessie";

    }

}

​

public class DerrikesGun : INerfGun

{

    public string shoot()

    {

        return "Derrike, please also shoot Jessie";

    }

}

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(shoot(new AmadeusGun()));

        Console.WriteLine(shoot(new DerrikesGun()));

    }

​

    public static string shoot(INerfGun nerfGun)

    {

        return nerfGun.shoot();

    }

}