# -*- coding: utf-8 -*-
L = map(int, raw_input().split()) # length
C = map(int, raw_input().split()) # color

for i in xrange(3):
    L[i] *= 2

S = sorted([L[0] + L[1], L[1] + L[2], L[2] + L[0]])
C = sorted(C)

ret = 0
for i in xrange(3):
    ret += S[i] * C[2 - i]

print ret