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);
	}
}