#include <bits/stdc++.h>
using namespace std;
int main()
{
    int t;
    cin >> t;
    for (int i = 0; i < t; i++)
    {
        int x, mod;
        cin >> x;
        mod = x % 3;
        if (mod == 1)
        {
            cout << "GRB" << endl;
        }
        else if (mod == 2)
        {
            cout << "GBR" << endl;
        }
        else
        {
            cout << "BGR" << endl;
        }
    }
    return 0;
}