#include <bits/stdc++.h>
using namespace std;
int main()
{
    int tcase;
    cin >> tcase;
    string pen = "RGB";
    while (tcase--)
    {
        int n, temp;
        cin >> n;
        for (int i = 1; i <= n; i++)
        {
            if (i % 2 != 0)
            {
                temp = pen[1];
                pen[1] = pen[0];
                pen[0] = temp;
            }
            else if (i % 2 == 0)
            {
                temp = pen[1];
                pen[1] = pen[2];
                pen[2] = temp;
            }
        }
        cout << pen << endl;
        pen = "RGB";
    }
    // cout << pen << endl;
}