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

int main() {
  string s;
  cin >> s;
  map<char,int> mp;
  for (char c : s) mp[c] += 1;
  for (auto m : mp) {
    if (m.second % 2 != 0) {
      cout << "No" << endl;
      return 0;
    }
  }
  cout << "Yes" << endl;
}