import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		double a = sc.nextDouble();
		double b = sc.nextDouble();
		if((a>=60 && b<60) || (a<60 && b>=60)){
			System.out.println("green");
		}else{
			System.out.println("red");
		}
		sc.close();
	}

}
/**************************************************************
	Problem: 1658
	User: admin
	Language: Java
	Result: Accepted
	Time:1831 ms
	Memory:40180 kb
****************************************************************/