Problem:
Score : 200 points

Problem Statement

Let w be a string consisting of lowercase letters.
We will call w beautiful if the following condition is satisfied:

Each lowercase letter of the English alphabet occurs even number of times in w.

You are given the string w. Determine if w is beautiful.

Constraints

1 \leq |w| \leq 100

w consists of lowercase letters (a-z).

Input

The input is given from Standard Input in the following format:

w

Output

Print Yes if w is beautiful. Print No otherwise.

Sample Input 1

abaccaba

Sample Output 1

Yes

a occurs four times, b occurs twice, c occurs twice and the other letters occur zero times.

Sample Input 2

hthth

Sample Output 2

No

Solution in Java7 (OpenJDK 1.7.0) (judge verdict: Accepted)

import java.util.Scanner;

public class Main {
	void run() {
		Scanner sc = new Scanner(System.in);

		char[] c = sc.next().toCharArray();
		int n = c.length;
		int[] count = new int['z' + 1];
		for (int i = 0; i < n; i++) {
			count[c[i]]++;
		}
		for (int i = 'a'; i <= 'z'; i++) {
			if (count[i] % 2 != 0) {
				System.out.println("No");
				return;
			}
		}
		System.out.println("Yes");
	}

	public static void main(String[] args) {
		new Main().run();
	}
}