  // B - 美しい文字列 / Beautiful Strings https://atcoder.jp/contests/abc044/tasks/abc044_b

  import io.Source
  import scala.collection.mutable

  object Main extends App {
    val xs = Source.stdin.getLines().foreach { w =>
      println(solve(w))
    }

    def solve(w: String): String = {
      val map = mutable.Map.empty[Char, Int]
      w.foreach { ch =>
        if (map.contains(ch)) {
          val c = map(ch)
          map(ch) = c + 1
        } else {
          map(ch) = 1
        }
      }
      if (map.forall { case (ch, c) => c % 2 == 0 })
        "Yes"
      else
        "No"
    }
  }
