func main()
	var l: []int :: [cui@inputInt(), cui@inputInt(), cui@inputInt()]
	var n: []int :: [cui@inputInt(), cui@inputInt(), cui@inputInt()]
	do l.sort()
	do n.sort()
	var ans: int :: (l[0] + l[1]) * n[2] + (l[0] + l[2]) * n[1] + (l[1] + l[2]) * n[0]
	do ans :* 2
	do cui@print("\{ans}\n")
end func