#include <algorithm>
#include <iostream>

using namespace std;

int main() {
  string w;
  cin >> w;
  bool pred = true;
  for(char c = 'a'; pred && c <= 'z'; ++c) {
    pred = count(begin(w),end(w),c) % 2 == 0;
  }

  cout << (pred ? "Yes" : "No") << endl;
  return 0;
}
