#include <bits/stdc++.h>
using namespace std;
 
int main() {
    int T;
    cin >> T;
 
    for (int t = 1; t <= T; ++t) {
        int N;
        cin >> N;
        string B;
        cin >> B;
 
 
        int countR = 0, countG = 0, countB = 0;
 
 
        for (char balloon : B) {
            if (balloon == 'R') countR++;
            else if (balloon == 'G') countG++;
            else if (balloon == 'B') countB++;
        }
 
 
        if (countR == countG && countG == countB) {
            cout << "Case " << t << ": Harmonious" << endl;
        } else {
            cout << "Case " << t << ": Not Harmonious" << endl;
        }
    }
 
    return 0;
}