func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     long long int t;     cin >> t;     while (t--) {       vector<string> s(9);       for (long long int i = 0; i < 9; i++) {         cin >> s[i];       }       s[0][0] = s[0][1];       s[1][3] = s[1][4];       s[2][6] = s[2][7];       s[3][1] = s[3][2];       s[4][4] = s[4][5];       s[5][7] = s[5][8];       s[6][2] = s[6][1];       s[7][5] = s[7][4];       s[8][8] = s[8][7];       for (long long int i = 0; i < 9; i++) {         cout << s[i] << endl;       }     }   }   