func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int t;     cin >> t;     long long int i;     while (t--) {       string a, b, c;       cin >> a >> b >> c;       long long int n = a.length(), f = 0;       for (i = 0; i < n; i++) {         if (a[i] != c[i] && b[i] != c[i]) {           cout <<  NO n ;           f = 1;           break;         } else if (a[i] == c[i])           swap(b[i], c[i]);         else           swap(a[i], c[i]);       }       if (f != 1) cout <<  YES n ;     }     return 0;   }   