#include<stdio.h>
using namespace std;
int i,test,n,bb;
char c[105],c1[105];
int main() {
    scanf("%d",&test);
    while (test--) {
        scanf("%d",&n);
        scanf("%s",c);
        scanf("%s",c1);
        bb=0;
        for (i=0;i<n;i++) {
            if (c[i]=='A'&&c1[i]=='U') continue;
            if (c[i]=='T'&&c1[i]=='A') continue;
            if (c[i]=='C'&&c1[i]=='G') continue;
            if (c[i]=='G'&&c1[i]=='C') continue;
            bb=1;
        }
        if (bb) printf("NO\n");
        else printf("YES\n");
    }
}