import scala.collection.mutable
object Main extends App {

  val line = scala.io.StdIn.readLine()
  val count = mutable.Map[Char, Int]()
  line.foreach{c =>
    val now = count.getOrElse(c, 0)
    count.put(c , now + 1) }

  val isBeautiful = count.values.forall(_ % 2 == 0)

  println(if (isBeautiful) "Yes" else "No")
}