#include<bits/stdc++.h>
using namespace std; 
int main(){
int a,b,c,d,n,m,x,y;
for(int i=1;i<=5;i++){
cin>>a;
b+=a;
}
if(b<=99){
cout<<"Gray";
}
if(b>=100&&b<=119){
cout<<"Blue";
}
if(b>=120&&b<=169){
cout<<"Green";
}
if(b>=170&&b<=229){
cout<<"Orange";
}
if(b>=230&&b<=500){
cout<<"Red";
}	
}