func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     while (t--) {       string a, b, c;       cin >> a >> b >> c;       int n = a.length();       int count = 0;       for (int i = 0; i < n; i++) {         if (c[i] == a[i] || c[i] == b[i])           continue;         else {           count++;           break;         }       }       if (count)         cout <<  NO  << endl;       else         cout <<  YES  << endl;     }   }   