func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     long long t;     cin >> t;     while (t--) {       long long w, h, k, arr[4], brr[1000000], ans;       cin >> w >> h;       for (int i = 0; i < 4; i++) {         cin >> k;         for (int j = 0; j < k; j++) {           cin >> brr[j];         }         arr[i] = (brr[k - 1] - brr[0]);       }       arr[0] = max(arr[0], arr[1]);       arr[2] = max(arr[2], arr[3]);       ans = max(arr[0] * h, arr[2] * w);       cout << ans << endl;     }   }   