func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     while (t--) {       int n;       cin >> n;       int k = 4 * n;       for (int i = 0; i < n; i++) {         cout << k <<    ;         k -= 2;       }       cout << endl;     }   }   