#include<iostream>
#include<cstdio>
using namespace std;

int maxs(int x, int y) {
    if (x > y)
        return x;
    return y;
}
int mins(int x, int y) {
    if (x < y)
        return x;
    return y;
}
int m, n;
int N;

char a[200], b[200];

int flag;
int main() {
    scanf("%d", &N);
    while (scanf("%d", &N) != EOF) {
        scanf("%s", a);
        scanf("%s", b);
        flag = 1;
        for (int i = 0; i < N; i++) {
            if (!((a[i] == 'A' && b[i] == 'U') || (a[i] == 'T' && b[i] == 'A')
                    || (a[i] == 'C' && b[i] == 'G')
                    || (a[i] == 'G' && b[i] == 'C'))) {
                flag = 0;
                break;
            }
        }
        if (flag) {
            printf("YES\n");
        } else {
            printf("NO\n");
        }
    }
    return 0;
}