import scala.io.StdIn

object Main {

  def main(args: Array[String]): Unit = {

    val w = StdIn.readLine()
    
    val countMap = collection.mutable.Map.empty[Char, Int]
    
    w.foreach { ch =>
      val c = countMap.getOrElse(ch, 0)
      countMap(ch) = c + 1
    }
    
    if (countMap.values.forall(_ % 2 == 0)) {
      println("Yes")
    } else {
      println("No")
    }
  }
}