# -*- coding: utf-8 -*-
import numpy

L = map(int, raw_input().split()) # length
C = map(int, raw_input().split()) # color

S = sorted(2 * numpy.array([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