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