ll = list(map(int, input().split())) rr = list(map(int,input().split())) rr.sort(reverse=True) x = ll[0]*2 + ll[1]*2 y = ll[1]*2 + ll[2]*2 z = ll[2]*2 + ll[0]*2 mm = sorted([x,y,z]) result = 0 for i in range(3): result += rr[i] * mm[i] print(result)