import java.io.PrintStream;
import java.util.Scanner;
import type.lib.ToolBox;

public class RedOrBlue 
{
   public static void main(String[] args) 
   {
      Scanner input = new Scanner(System.in);
      PrintStream output = System.out;

      output.println("0 : red");
      output.println("1 : blue");
      output.print("Enter your choice: ");
      int choice = input.nextInt();
      String color;
      if (choice == 0) 
      {
         color = "red";
      } 
      else if (choice == 1) 
      {
         color = "blue";
      }
      else 
      {
         ToolBox.crash(true, "invalid color");
	 color = "invalid"; // needed to make compiler happy
      }
      output.println(color);
   }
}