import string
import sys
import re

acceptable_chars = set(string.ascii_letters + ' ' + string.punctuation)

s = sys.stdin.readline()
assert re.match('^({0} )*{0}\n$'.format('[a-zA-Z]+[^a-zA-Z ]*'), s)
assert set(s.strip()) <= acceptable_chars
assert 1 <= len(s) <= 201
assert sys.stdin.readline() == ''

sys.exit(42)