class Yukicoder
  def initialize
    l = gets.chomp.split.map(&:to_i)
    box = []
    l.each_with_index do |a, i|
      box << 2 * (a + l[(i+1)%l.size])
    end
    r, b, y = gets.chomp.split.map(&:to_i)

    answer = 0

    box.sort.zip([r,b,y].sort.reverse).each do |a|
      answer += a[0] * a[1]
    end

    puts answer
  end
end

Yukicoder.new