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)

function Main(input) {
  const data = input.trim();

  var strs = data.split("");

  var list = [];

  strs.forEach((n) => {
    if (list.indexOf(n) == -1) {
      list.push(n);
    } else {
      var idx = list.indexOf(n);
      list.splice(idx, 1);
    }
  });

  if (list.length > 0) {
    console.log("No");
  } else {
    console.log("Yes");
  }
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));