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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;

public class Main {

	public static void main(String[] args) throws Exception{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] line = br.readLine().toCharArray();
		Map<Character,Integer> map = new HashMap<Character,Integer>();
		
		for(char c : line){
			if(!map.containsKey(c)){
				map.put(c, 1);
			}else{
				map.put(c, map.get(c)+1);
			}
		}
		
		for(int i : map.values()){
			if(i%2!=0){
				System.out.println("No");
				return;
			}
		}
				
		System.out.println("Yes");
	}
}