import java.util.*;
import java.lang.*;
import java.io.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int[] ls = new int[3];
        for (int i=0; i<3; i++) {
            ls[i] = sc.nextInt();
        }

        int[] rollCnts = new int[3];
        for (int i=0; i<3; i++) {
            rollCnts[i] = sc.nextInt();
        }

        Arrays.sort(ls); // 昇順
        Arrays.sort(rollCnts);

        int ans = 0;

        ans += rollCnts[2] * ((ls[0] + ls[1]) * 2);
        ans += rollCnts[1] * ((ls[0] + ls[2]) * 2);
        ans += rollCnts[0] * ((ls[1] + ls[2]) * 2);

        System.out.println(ans);
    }

}