#include<bits/stdc++.h>
using namespace std;
int main(){
    double x,y;
    cin>>x>>y;
    if(x>=60&&y<60||x<60&&y>= 60){
        cout<<"green";
    }else{
        cout<<"red";
    }
    return 0;
}

/**************************************************************
	Problem: 1658
	User: panjinyan
	Language: C++
	Result: Accepted
	Time:19 ms
	Memory:2072 kb
****************************************************************/