import java.util.Scanner;

public class App {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        if (num >= 3200) {
            System.out.println(sc.nextLine());
        } else {
            System.out.println("red");
        }
        sc.close();
    }
}