#include<bits/stdc++.h>
typedef long long ll;
using namespace std;
int INF = 1e9;
int MOD = 1e9+7;
main(){
    int L1,L2,L3,C[3];
    cin >> L1 >> L2 >> L3 >> C[0] >> C[1] >> C[2];
    int L[] = {2*(L1+L2),2*(L2+L3),2*(L3+L1)};
    sort(L,L+3);
    sort(C,C+3);
    cout << L[0]*C[2] + L[1]*C[1] + L[2]*C[0] << endl;
}