#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
typedef long long ll;


int main(){
	long long ans = 0;
	string s;
	cin >> s;
	for(auto c : s ){
		ans ^= (1<<(c-'a'));
	}
	if( ans == 0 ) cout << "Yes" << endl;
	else cout << "No" << endl;
}
