object Main extends App {
  val inputs: Seq[String] = scala.io.Source.stdin.getLines().toList
  val w = inputs.head

  println(solve(w))

  def solve(w: String): String = {
    val charMap = scala.collection.mutable.HashMap.empty[Char, Int]
    var result = "Yes"
    w.toSeq.foreach { c =>
      if (charMap.contains(c)) {
        charMap.update(c, charMap(c) + 1)
      } else {
        charMap.update(c, 1)
      }

      if (charMap(c) % 2 == 0) {
        result = "Yes"
      } else {
        result = "No"
      }
    }
    result
  }
}