#include <bits/stdc++.h>
using namespace std;
int main(){
	float a,s;
	cin>>a>>s;
	if((a>=60&&s<60)||(s>=60&&a<60)){
		cout<<"green";
	}else{
		cout<<"red";
	}
}

/**************************************************************
	Problem: 1658
	User: tonghuawei
	Language: C++
	Result: Accepted
	Time:20 ms
	Memory:2072 kb
****************************************************************/