import java.util.Scanner

object Main extends App  {
  val sc = new Scanner(System.in)
  val w = sc.next.split("(?<=.)")

  val ac = new Array[Int](26)
  val alphabets = "abcdefghijklmnopqrstuvwxyz"

  val tArr =
    w.foldLeft(ac){case (arr, c) =>
      val i = alphabets.indexOf(c)
      val x = arr(i)
      arr.update(i, x + 1)
      arr
    }

  val res = if(tArr.forall(_ % 2 == 0)) "Yes" else "No"

  println(res)
}
