#include<bits/stdc++.h>
using namespace std;
int main(){
	float n,m;
	cin>>n>>m;
	if(n>=60&&m<60||n<60&&m>=60){
		cout<<"green";
	}else{
		cout<<"red";
	}
}
/**************************************************************
	Problem: 1658
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:24 ms
	Memory:2072 kb
****************************************************************/