func_code_string: #include <bits/stdc++.h>   using namespace std;   vector<vector<int> > ans;   void gen(int n) {     for (int e = 0; e < n; e++)       ans.push_back({6 * e + 1, 6 * e + 2, 6 * e + 3, 6 * e + 5});   }   int main() {     int n, k;     cin >> n >> k;     cout << k * (6 * n - 1) << endl;     gen(n);     for (auto &it : ans)       for (int e = 0; e < 4; e++) cout << k * it[e] <<    n [e == 3];     return 0;   }   