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 (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

int main(void)
{
	char w[110]; 
	int i = 0, alpha_count[26] = { 0 };

	scanf("%s", w);

	while (w[i] != '\0') {
		alpha_count[w[i++] - 'a']++;
	}

	for (i = 0; i < 26; i++) {
		if (alpha_count[i] % 2 == 1) {
			printf("No\n");
			return 0;
		}
	}

	printf("Yes\n");
	return 0;
}