import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        String s = sc.nextLine();
        if (a>=3200){
            System.out.println(s);
        }else {
            System.out.println("red");
        }
    }
}
