#include <bits/stdc++.h>
using namespace std;


int main(){
	double x,y;
	cin>>x>>y;
	if(x >= 60 && y < 60 || x < 60 && y >= 60){
		cout<<"green";
	}else{
		cout<<"red";
	}
}
/**************************************************************
	Problem: 1658
	User: admin
	Language: C++
	Result: Accepted
	Time:41 ms
	Memory:2072 kb
****************************************************************/