#!/usr/bin/ruby
# -*- coding: utf-8 -*-
#
# 341.rb: No.341 沈黙の期間 - yukicoder
#

### main

s = gets.strip.split('')

pos = 0
n = s.size
maxlen = 0

while pos < n
  while pos < n && s[pos] != "…"
    pos += 1
  end

  ppos = pos
  while pos < n && s[pos] == "…"
    pos += 1
  end

  len = pos - ppos
  if maxlen < len
    maxlen = len
  end
end

puts maxlen