func_code_string: #include <bits/stdc++.h>   using namespace std;   int gcd(int a, int b) { return b == 0 ? a : gcd(b, a % b); }   bool Check(int x, int y) {     if (gcd(x, y) > 1) return false;     if (gcd(x + 1, y) > 1) return false;     if (gcd(x + 2, y) > 1) return false;     return true;   }   vector<int> ans[10010];   int main() {     int n, k;     cin >> n >> k;     int x = 1;     for (int i = 0; i < (n); i++) {       ans[i].push_back(x * k);       ans[i].push_back((x + 1) * k);       ans[i].push_back((x + 2) * k);       int y = x + 4;       while (!Check(x, y)) y += 2;       ans[i].push_back(y * k);       x = y + 2;     }     cout << (x - 2) * k << endl;     for (int i = 0; i < (n); i++)       cout << ans[i][0] <<     << ans[i][1] <<     << ans[i][2] <<                << ans[i][3] << endl;     return 0;   }   