func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     while (t--) {       string s, s1, s2;       cin >> s >> s1 >> s2;       bool lock = false;       for (int i = 0; i < s.length(); i++) {         if (s[i] == s2[i]) {           swap(s1[i], s2[i]);         } else {           if (s1[i] == s2[i]) {             swap(s[i], s2[i]);           } else {             lock = true;             break;           }         }       }       if (lock)         cout <<  NO  << endl;       else {         if (s == s1)           cout <<  YES  << endl;         else           cout <<  NO  << endl;       }     }     return 0;   }   