#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main(void) {
    vector<int> l;
    vector<int> color;
    for (int i = 0; i < 3; i++) {
        int n;
        cin >> n;
        l.push_back(n);
    }
    for (int i = 0; i < 3; i++) {
        int n;
        cin >> n;
        color.push_back(n);
    }
    sort(l.begin(), l.end());
    sort(color.begin(), color.end());
    cout << (l[0]+l[1])*2*color[2] + (l[0]+l[2])*2*color[1] + (l[1]+l[2])*2*color[0] << endl;
    return 0;
}