# -*- coding: utf-8 -*-
import sys
import codecs
import re

sys.stdin = codecs.getreader('utf_8')(sys.stdin)
sys.stdout = codecs.getwriter('utf_8')(sys.stdout)
A = raw_input()
result = re.findall(ur"…+", A)
if len(result) > 0:
    print max(map(lambda s: len(s), result))
else:
    print 0