using System;

public class Program

{

    public static void Main()

    {

            Console.WriteLine("Please choose a letter from the following (B-R-O-P-G-W-Y)");     

            Console.WriteLine("Corresponding Letters and Colors"); 

            string color = Console.ReadLine();

switch (color) 

{

  case "R":

    Console.WriteLine("Red");

    break;

  case "B":

    Console.WriteLine("Brown");

    break;

  case "O":

    Console.WriteLine("Orange");

    break;

  case "P":

    Console.WriteLine("Pink");

    break;

  case "G":

    Console.WriteLine("Green");

    break;

  case "W":

    Console.WriteLine("White");

    break;

  case "Y":

    Console.WriteLine("Yellow");

    break;

  default :

    Console.WriteLine("error"); 

    break ;

    }

    }

}