package main

import (
	"fmt"
	"sort"
)

func main() {
	var l1, l2, l3 int
	rby := make([]int, 3)
	fmt.Scan(&l1, &l2, &l3, &rby[0], &rby[1], &rby[2])
	l := make([]int, 3)
	l[0] = l1*2+l2*2
	l[1] = l1*2+l3*2
	l[2] = l2*2+l3*2
	sort.Ints(l)
	sort.Ints(rby)
	fmt.Println(l[0]*rby[2]+l[1]*rby[1]+l[2]*rby[0])
}