import sys
import re

sentence = input()  
sentence = re.split(r'\W+', sentence)   # 以非字母分割字符串
sentence = ' '.join(reversed(sentence)) 

for i in sentence:
    if ord(i) < 65 or (90 < ord(i) < 97) or ord(i) > 122:  #既不是大写字母也不是小写字母
        sentence = sentence.replace(i, " ")

print(sentence)