#include <bits/stdc++.h>
using namespace std;

int main(){
  string w;
  cin>>w;
  map<char,int> A;
  for(char c:w)
    A[c]++;
  for(pair<char,int> i:A)
    if(i.second%2==1){
      cout<<"No"<<endl;
      return 0;
    }
  cout<<"Yes"<<endl;
}