#include <bits/stdc++.h>

using namespace std;


int main()
{
    int sides[3];
    cin>>sides[0]>>sides[1]>>sides[2];
    int reps[3];
    cin>>reps[0]>>reps[1]>>reps[2];
    int sums[3];
    sums[0]=(sides[0]+sides[1])*2;
    sums[1]=(sides[1]+sides[2])*2;
    sums[2]=(sides[2]+sides[0])*2;
    sort(sums,sums+3);
    sort(reps,reps+3);
    reverse(reps,reps+3);
    long long r=0;
    for(int ctr1=0;ctr1<3;ctr1++)
        r+=sums[ctr1]*reps[ctr1];
    cout<<r<<endl;
    return 0;
}