#include <bits/stdc++.h>
using namespace std;
 
int main()
{
	string s;
	cin >> s;
	map<char, int> M;
	for (auto a : s)
	{
		++M[a];
	}
	for (auto a : s)
	{
		if (M[a] % 2)
		{
			cout << "No" << endl;
			return 0;
		}
	}
	cout << "Yes" << endl;
	return 0;
}