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

sys.stdin = codecs.getreader('utf_8')(sys.stdin)
sys.stdout = codecs.getwriter('utf_8')(sys.stdout)
A = raw_input()
current = 0
mx = 0
for a in A:
    if a == u"…":
        current += 1
        mx = max(mx, current)
    else:
        current = 0
print mx