#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
const int N=850;

int main()
{
#ifndef ONLINE_JUDGE
    freopen("in.txt", "r", stdin);
#endif
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t;
    cin>>t;
    while(t--){
        int n;
        string s,a,x,y;
        cin>>n;
        cin>>s;
        cin>>a;
        for(int i=0;i<n;i++){
            if(s[i]!='.')x+=s[i];
        }
        for(int i=0;i<n;i++){
            if(a[i]!='.')y+=a[i];
        } 
        cout<<(x==y?"yes":"no")<<'\n';
    }   
}