#include <bits/stdc++.h>

using namespace std;

int cnt[27];

int main() {
    bool ok = true;
    string s; cin>>s;
    for(char c : s){
        cnt[c - 'a']++;
    }
    for(int i = 0 ; i < 27; ++i){
        ok &= (cnt[i] % 2 == 0);
    }
    cout<<(ok?"Yes":"No")<<endl;
}