#include<iostream>
#include<bits/stdc++.h>
using namespace std;

void solve(){
    int k;
    cin>>k;
    int mod = k % 3;

    if(mod==1){
        cout<<"GRB"<<endl;
    }
    else if(mod==2){
        cout<<"GBR"<<endl;
    }
    else if(mod==0){
        cout<<"BGR"<<endl;
    }
}

int main(){

    int test;
    cin>>test;
    while(test--){
        solve();
    }

    return 0;
}