using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
using System.Text.RegularExpressions;
using System.Linq;
using System.IO;

class Program
{
    static private Magatro M = new Magatro();
    static private void Main(string[]args)
    {
        M.Scan();
        M.Solve();
    }
}

public class Scanner
{
    private string[] S;
    private int Index;
    private char Separator;

    public Scanner(char separator = ' ')
    {
        Index = 0;
        Separator = separator;
        S = new string[0];
    }

    private string[] Line()
    {
        return Console.ReadLine().Split(Separator);
    }

    public string Next()
    {
        string result;
        if (Index >= S.Length)
        {
            S = Line();
            Index = 0;
        }
        result = S[Index];
        Index++;
        return result;
    }
    public int NextInt()
    {
        return int.Parse(Next());
    }
    public double NextDouble()
    {
        return double.Parse(Next());
    }
    public long NextLong()
    {
        return long.Parse(Next());
    }
}

public class Magatro
{
    private int L1, L2, L3;
    private int R, B, Y;

    public void Scan()
    {
        Scanner sc = new Scanner();
        L1 = sc.NextInt();
        L2 = sc.NextInt();
        L3 = sc.NextInt();
        R = sc.NextInt();
        B = sc.NextInt();
        Y = sc.NextInt();
    }

    public void Solve()
    {
        Sort(ref L1, ref L2, ref L3);
        Sort(ref R, ref B, ref Y);
        int ans = 0;
        ans += 2 * R * (L2 + L3);
        ans += 2 * B * (L1 + L3);
        ans += 2 * Y * (L1 + L2);
        Console.WriteLine(ans);
    }

    private void Sort(ref int a,ref int b,ref int c)
    {
        int cpa = a, cpb = b, cpc = c;
        a = Math.Min(cpa, Math.Min(cpb, cpc));
        c = Math.Max(cpa, Math.Max(cpb, cpc));
        b = cpa + cpb + cpc - a - c;
    }
}