object Main extends App {

  val arr = scala.io.StdIn.readLine().split("")
  val map = scala.collection.mutable.Map[String, Int]()
  arr.foreach { s =>
    if (map.contains(s)) {
      map(s) = map.get(s).get + 1
    } else {
      map(s) = 1
    }
  }

  if (map.values.toList.forall(i => i % 2 == 0)) println("Yes")
  else println("No")

}
