#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: wangyiyang
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/