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 PyPy3 (2.4.0) (judge verdict: Accepted)

from collections import defaultdict


def main():
    S = input()
    d = defaultdict(int)
    for c in S:
        d[c] += 1
    for n in d.values():
        if n % 2 == 1:
            print('No')
            exit()
    print('Yes')


if __name__ == '__main__':
    main()