#include<bits/stdc++.h>
using namespace std;
int main()
{
	short  a,b,c,d,e,f,ans;
	cin>>a>>b>>c>>d>>e;
	ans=a+b+c+d+e;
	if(ans<=99&&ans>=0){
		cout<<"Gray"<<endl;
		return 0;
	}
	if(ans<=119&&ans>=100){
		cout<<"Blue"<<endl;
		return 0;
	}
	if(ans<=169&&ans>=120){
		cout<<"Green"<<endl;
		return 0;
	}
	if(ans<=229&&ans>=170){
		cout<<"Orange"<<endl;
		return 0;
	}
	if(ans<=500&&ans>=230){
		cout<<"Red"<<endl;
		return 0;
	}
}