l = list(map(int, input().split()))
c = sorted(map(int, input().split()))

x = (l[0] + l[1]) * 2
y = (l[1] + l[2]) * 2
z = (l[0] + l[2]) * 2

l = sorted([x, y, z])
c = c[::-1]

x = l[0]*c[0] + l[1]*c[1] + l[2]*c[2]

print(x)