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: Wrong Answer)

'use strict';

const lines = require("fs").readFileSync("/dev/stdin", "utf8").split("");
let answer = "Yes";

for (let i = 0; i < lines.length; i++) {
  let count = 0;
  //同じ文字を数える
  lines.forEach(letter => {
    if (lines[i] === letter)
    count++;
  });
  //数えた数が奇数ならNoを返して抜ける
  if (count % 2 === 1) {
    answer = "No";
    break;
  }
}
console.log(answer);