func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     int n, m;     cin >> n >> m;     for (int i = 0; i < n; ++i) {       for (int j = 0; j < m; ++j) {         int k;         cin >> k;         if (k % 2 != (i + j) % 2) k++;         cout << k <<    ;       }       cout << endl;     }   }   int main() {     int n;     cin >> n;     while (n--) {       solve();     }     return 0;   }   