import math._

object Main {
  def main(args: Array[String]) {
    val sc = new java.util.Scanner(System.in)
    val l1, l2, l3 = sc.nextInt
    val cs = Array.fill(3)(sc.nextInt)

    val xs = Array(2 * (l1 + l2), 2 * (l2 + l3), 2 * (l3 + l1)).sorted
    val ans = xs.zip(cs.sorted.reverse).map { case (a, b) => a * b }.sum
    println(ans)
  }
}