#include <iostream>
#include <cstdio>
#include<cstring>
using namespace std;
int t,n,x;
char d[105],r[105];
int main(){
//freopen("in.txt","r",stdin);
cin>>t;
for(int i=0;i<t;i++){
cin>>n;
scanf("%s",d);
scanf("%s",r);
x=0;
for(int j=0;j<n;j++){
if((d[j]==‘A‘&&r[j]==‘U‘)||(d[j]==‘T‘&&r[j]==‘A‘)||(d[j]==‘C‘&&r[j]==‘G‘)||(d[j]==‘G‘&&r[j]==‘C‘))
x++;
}
if(x!=n)
cout<<"NO"<<endl;
else
cout<<"YES"<<endl;
}
return 0;
}
