#include<iostream>
#include<string.h>
#include<string>
#include<math.h>
#include<map>
#include<set>
using namespace std;

char A[1000], B[1000];
int main() {
    int T;
    scanf("%d", &T);
    while (T--) {
        int n;
        scanf("%d", &n);
        scanf("%s%s", A, B);
        int res = 0;
        for (int i = 0; i < n; i++) {
            if (A[i] == 'A' && B[i] == 'U') res++;
            if (A[i] == 'C' && B[i] == 'G') res++;
            if (A[i] == 'G' && B[i] == 'C') res++;
            if (A[i] == 'T' && B[i] == 'A') res++;
        }
        if (res == n) printf("YES\n");
        else printf("NO\n");

    }
    return 0;
}