#include<bits/stdc++.h>
using namespace std;
int cnt[26];
int main(){
  string s;
  cin>>s;
  for(int i=0;i<s.length();i++)cnt[s[i]-'a']++;
  for(int i=0;i<26;i++)if(cnt[i]%2!=0)return cout<<"No",0;
  cout<<"Yes\n";
}