fun main(args: Array<String>){
    var N = readLine()!!.toList().map{it.toString()}

    var a = mutableMapOf<String, Int>()

    for(i in N){
        if(a.keys.contains(i)){
            a[i] = a[i]?.plus(1) ?: 1
        }else{
            a[i] = 1
        }
    }
    if(a.values.all { it % 2 == 0 }){
        println("Yes")
    }else{
        println("No")
    }
}
