object Main extends App {
  
  val sc = new java.util.Scanner(System.in)
  val m  = sc.next().toList.groupMapReduce(identity)(_ => 1)(_ + _)
  if (m.values.toList.forall(v => v % 2 == 0)) {
    println("Yes")
  } else {
    println("No")
  }
}