#include <stdio.h>
 
int main() {
    int T;
    scanf("%d", &T);
 
    for (int i = 1; i <= T; i++) {
        int N;
        scanf("%d", &N);
 
        char B[N + 1];
        scanf("%s", B);
 
        int countR = 0, countG = 0, countB = 0;
 
        for (int j = 0; j < N; j++) {
            if (B[j] == 'R')
                countR++;
            else if (B[j] == 'G')
                countG++;
            else if (B[j] == 'B')
                countB++;
        }
 
        if (countR == countG && countG == countB)
            printf("Case %d: Harmonious\n", i);
        else
            printf("Case %d: Not Harmonious\n", i);
    }
 
    return 0;
}