func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     string s1, s2, s3;     cin >> n;     while (n--) {       cin >> s1 >> s2 >> s3;       for (int i = 0; i < s1.length(); i++) {         if (s3.at(i) != s2.at(i) && s3.at(i) != s1.at(i)) {           cout <<  NO n ;           break;         }         if (i == s1.length() - 1) cout <<  YES n ;       }     }     return 0;   }   