using System;

public class Program

{

    public static void Main()

    {

        string color;

        Console.Write("Input color name :");

        color = Console.ReadLine();

        switch(color)

        {

            case "red" : Console.WriteLine("red"); break;

            case "green" : Console.WriteLine("Two"); break;

            case "blue" : Console.WriteLine("Three"); break;

            case "yellow" : Console.WriteLine("Three"); break;

            default : Console.WriteLine("error"); break;

        }

    }

}