func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve(void) {     string a, b, c;     cin >> a >> b >> c;     int n = a.length();     for (int i = 0; i < n; i++) {       if (c[i] != a[i] && c[i] != b[i]) {         cout <<  NO n ;         return;       }     }     cout <<  YES n ;   }   int main(void) {     ios_base ::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     int t;     cin >> t;     while (t--) {       solve();     }     return 0;   }   