#include<stdio.h>
#define N 1005
using namespace std;
char a[N],b[N];int T,n,i;
int ok(char ch1,char ch2){
    if (ch1=='A'&&ch2=='U') return 1;
    if (ch1=='T'&&ch2=='A') return 1;
    if (ch1=='C'&&ch2=='G') return 1;
    if (ch1=='G'&&ch2=='C') return 1;
    return 0;
}
int main(){
    scanf("%d",&T);
    while (T--){
        scanf("%d",&n);
        scanf("%s",a+1);
        scanf("%s",b+1);
        for (i=1;i<=n;i++)
            if (!ok(a[i],b[i])) break;
        puts(i==n+1?"YES":"NO");
  }
}