import itertools

L = tuple(map(int, input().split()))
RBY = tuple(map(int, input().split()))

L_comb = [sum(t) * 2 for t in itertools.combinations(L, 2)]

ans = min(sum(L_comb[i] * t[i] for i in range(3))
          for t in itertools.permutations(RBY))
print(ans)