#include<cstdio>
#include<cstring>
#include<iostream>
using namespace std;
const int maxn = 110 ;
char s[maxn] ;
char t[maxn] ;
char s1[10] =  "ATCG" ;
char s2[10] =  "UAGC" ;
int main()
{
    int T ;
    scanf("%d" , &T) ;
    while(T--){
        int n ;
        scanf("%d" , &n);
        scanf("%s" , s) ;
        scanf("%s" , t) ;
        bool flag = false ;
        for(int i = 0;i < n;i++){
            int pos ;
            for(int j = 0 ;j < 4;j++){
               if(s[i] == s1[j]){
                  pos = j ;
                  break ;
               }
            }
            if(t[i] != s2[pos]){
               flag = true ;
               break ;
            }
        }
        if(!flag)
           puts("YES");
        else puts("NO") ;
    }
    return  0 ;
}