Option Strict On
Imports System.Console
Imports System.Collections.Generic

Module Program
    Sub Main()
        Dim w As String = NextString()
        Dim dic As New Dictionary(Of Char, Integer)

        Dim ans As String = "Yes"

        For Each v As Char In w
            If Not dic.ContainsKey(v) Then
                dic(v) = 0
            End If

            dic(v) += 1
        Next

        For Each item In dic
            If item.Value Mod 2 <> 0 Then
                ans = "No"
                Exit For
            End If
        Next

        WriteLine(ans)
    End Sub

    Function NextString() As String
        Dim result As New List(Of String)
        Do
            Dim tmp As Integer = Read()
            If tmp < 0 Then Exit Do
            Dim nextChar As Char = Chr(tmp)

            If Not Char.IsWhiteSpace(nextChar) Then
                result.Add(nextChar)
            ElseIf nextChar <> vbCr Then
                Exit Do
            End If
        Loop
        Return String.Join("", result)
    End Function

End Module
