#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: Accepted
	Time:18 ms
	Memory:2072 kb
****************************************************************/