func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, k;     cin >> n >> k;     cout << k * (6 * n - 1) << endl;     for (int i = 0; i < n; i++) {       cout << (6 * i + 1) * k <<     << (6 * i + 2) * k <<     << (6 * i + 3) * k            <<     << (6 * i + 5) * k << endl;     }     return 0;   }   