#include <bits/stdc++.h>
using namespace std;
#define ll long long
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
#ifndef ONLINE_JUDGE
    freopen("in.txt", "r", stdin);
    freopen("out.txt", "w", stdout);
#endif
    int t;
    cin >> t;
    while (t--) {
        string a, b;
        int n;
        cin >> n;
        cin >> a >> b;
        string A, B;
        for (char &i : a) {
            if (i != '.') A += i;
        }
        for (char &i : b) {
            if (i != '.') B += i;
        }
        cout << (A == B ? "yes" : "no") << '\n';
    }
    return 0;
}