fun main(args: Array<String>) {
  val w = readLine()!!
  var ls = mutableMapOf(' ' to 0)
  for(s in w){
    ls[s] = 1+if(ls.containsKey(s)) ls[s]!! else 0
  }
  var f = true
  ls.forEach{
      if(it.value%2 != 0){f = false}
  }
  println(if(f) "Yes" else "No")
}