100441: [AtCoder]ABC044 B - Beautiful Strings

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