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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;

class Program {
  static void Main() {
    var s = Console.ReadLine();
    int[] a = new int[26];
    foreach (var c in s) {
      a[c - 97]++;
    }
    var ans = "Yes";
    foreach (var n in a) {
      if ((n & 1) == 1) {
        ans = "No";
        break;
      }
    }
    Console.WriteLine(ans);
  }
}