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(){
	int l, alpha[26] = {0}, i;
	char s;
	while((i = scanf("%c", &s)) != EOF){
		if(s == '\0') break;
		alpha[s - 'a'] ++;
	}
	for(i = 0 ; i < 26 ; i ++){
		if(alpha[i] % 2 != 0){
			printf("No\n");
			return 0;
		}
	}
	printf("Yes\n");
	return 0;
}