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 Ruby (2.3.3) (judge verdict: Runtime Error)

L = gets.chomp
W = Array.new(26)
for i in 0..W.length-1
	W[i] = 0
end

for i in 0..L.length-1
	W[L[i].ord-"a".ord] += 1
end
for i in 0..W.length-1
	if W[i]%2 != 0
		puts "No"
		return
	end
end
puts "Yes"