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

int main(){
  string s;
  cin >> s;
  int even[26]={};
  for(char i:s){
      even[i-'a']++;
  }
  for(int i:even){
      if(i%2!=0){
          cout << "No" << endl;
          return 0;
      }
  }
  cout << "Yes" << endl;
  return 0;
}