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.
# solution

data = input()
for i in data:
    if data.count(i) % 2:
        print('No')
    exit()
print('Yes')
data = input()
print("Yes" if all([data.count(i)%2==0 for i in set(data)]) else "No")