#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<cmath>
#include<vector>
#include<queue>
#include<map>
#define inf 0x333f3f3f
#define mod 9999991
using namespace std;
void fre(){freopen("d://input.txt","r",stdin);freopen("d://output.txt","w",stdout);}
#define MS(x,y) memset(x,y,sizeof(x))
typedef __int64  LL;
const int N=105;
char s1[N],s2[N];
map<char,char> mp;
int main(){
int t,n;
mp['A']='U';mp['T']='A';mp['G']='C';mp['C']='G';
scanf("%d",&t);
//getchar();
while(t--){
        scanf("%d",&n);
scanf("%s",s1);
 scanf("%s",s2);
 int flag=1;
  for(int i=0;s1[i]!='\0';i++){
     if(mp[s1[i]]==s2[i]) continue;
     else{
        flag=0;break;
     }
  }
  if(flag)
    puts("YES");
  else puts("NO");
}
return 0;
}