MODE = "stdio"

tmp = Array.new




if(defined? MODE)
  tmp = STDIN.read.split("\n")
else
  iotmp = "\
  ……何で………もないです。
  ".split("\n")
  iotmp.each{|s|
    tmp << s.strip
  }
end


maxcnt=cnt=0
tmp[0].each_char do |ch|
  if ch=="…"
     cnt += 1
  else
    cnt=0
  end
  
  maxcnt = [maxcnt, cnt].max
end


puts maxcnt