import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = Integer.parseInt(sc.nextLine());
		String s = sc.nextLine();
		sc.close();
		if(a >= 3200){
			System.out.println(s);
		}else{
			System.out.println("red");
		}
	}
}