#include <cstdio>

int t, n;
char dna[105], rna[105];

bool judge() {
    for (int i = 0; i < n; ++i) {
        if (dna[i] == 'A') {
            if (rna[i] != 'U') return false;
        } else if (dna[i] == 'C') {
            if (rna[i] != 'G') return false;
        } else if (dna[i] == 'G') {
            if (rna[i] != 'C') return false;
        } else {
            if (rna[i] != 'A') return false;
        }
    }
    return true;
}

int main() {
    scanf("%d", &t);
    while (t--) {
        scanf("%d", &n);
        scanf("%s %s", dna, rna);
        if (judge()) puts("YES");
        else puts("NO");
    }
    return 0;
}