#include<bits/stdc++.h>
using namespace std;
int main(){
	int t; cin >> t;

	while(t--){
  		int n;
  		cin >> n;

  		if(n%6 == 0) cout << "RGB";
  		else if(n%6 == 1) cout << "GRB";
  		else if(n%6 == 2) cout << "GBR";
  		else if(n%6 == 3) cout << "BGR";
  		else if(n%6 == 4) cout << "BRG";
  		else if(n%6 == 5) cout << "RBG";
  		cout << endl;
	}
}