import java.io.PrintWriter
val pw = PrintWriter(System.out)

fun main(args : Array<String>) {
    func()
    pw.flush()
}

fun func() {
    val ww = next().toList().sorted()

    var lastChar = '-'
    var count = 0

    for (w in ww) {
        if (w != lastChar) {
            if (count % 2 == 1) {
                println("No")
                return
            }
            lastChar = w
            count = 1
            continue
        }
        count++
    }

    println(if (count % 2 == 1) "No" else "Yes")
}

fun next() = readLine()!!

fun println(value : Any) {
    pw.println(value)
}