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 PHP7 (7.0.15) (judge verdict: Accepted)

 <?php   
   fscanf(STDIN,"%s",$w);
   $re=array();
	for($i=0;$i<strlen($w);$i++){
      $re[$w[$i]]++;
    }


foreach($re as $v){
  if($v%2!=0){
    echo "No\n";
    exit;
  }
}

echo "Yes\n";