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 JavaScript (node.js v5.12) (judge verdict: Accepted)

'use strict'
const main = arg => {
	const input = arg.trim().split("\n");
	let W = input[0]
	const alphabets = 'abcdefghijklmnopqrstuvwxyz'
	for(let i = 0 ; i < alphabets.length ; i++) {
		let match = W.match(new RegExp(alphabets[i], 'g'))
		if(match && match.length % 2 === 1) {
			console.log('No')
			return
		}
	}
	console.log('Yes')
}   
main(require('fs').readFileSync('/dev/stdin', 'utf8'));