using System;

public enum Semaphore 

{

    Red,

    Yellow,

    Green

}

​

public class Program

{

    public static void Main()

    {

        Semaphore x = (Semaphore)10;        

        Console.WriteLine(x.ToString());

        x = (Semaphore)1;       

        Console.WriteLine(x.ToString());

        x = (Semaphore)5;       

        Console.WriteLine(x.ToString());

        x = (Semaphore)2;       

        Console.WriteLine(x.ToString());

    }

}