func_code_string: #include <bits/stdc++.h>   using namespace std;   ostream &operator<<(ostream &out, vector<long long> &a) {     for (auto i : a) out << i <<    ;     return out;   }   istream &operator>>(istream &in, vector<long long> &a) {     for (auto &i : a) in >> i;     return in;   }   int main() {     cin.tie(0);     cout.tie(0);     ios_base::sync_with_stdio(0);     long long q;     cin >> q;     while (q--) {       string a, b, c;       cin >> a >> b >> c;       bool boo = 0;       for (long long i = 0; i < a.size(); ++i) {         if (c[i] != b[i] && c[i] != a[i]) {           cout <<  NO                 <<   n ;           boo = 1;           break;         }       }       if (!boo)         cout <<  YES               <<   n ;     }     return 0;   }   