object Main {
  def main(args: Array[String]):Unit = {
      val w = io.StdIn.readLine
      val isBeauty = w.sorted.groupBy(c => c).forall{
        case (k, s) => s.length % 2 == 0
      }

      val answer = if(isBeauty) "Yes" else "No"
      println(answer)
  }
}
