#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y;
	cin>>x>>y;
	if (x>=60 && y<60 || x<60 && y>=60){
		cout<<"green"<<endl;
	}
	else {
		cout<<"red"<<endl;
	}
	return 0;
}
/**************************************************************
	Problem: 1658
	User: xiaojingxuan
	Language: C++
	Result: Wrong Answer
****************************************************************/