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 Java (OpenJDK 11.0.6) (judge verdict: Accepted)

import java.util.*;
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    char[] s = sc.next().toCharArray();
    if(s.length%2==1){
      System.out.println("No");
      return;
    }else{
      Arrays.sort(s);
      char x = s[0];
      int count = 0;
      for(int i=0;i<s.length;i++){
        if(x==s[i]){
          count++;
        }else{
          if(count%2==1){
            System.out.println("No");
            return;
          }
          count = 1;
          x = s[i];
        }
      }
      System.out.println("Yes");
    }
  }
}