# coding: utf-8
s = gets.chop
count = 0
ans = 0
for i in 0..s.size+1 do
  if s[i] == '…' then
    count += 1
  else
    if count > 0 then
      if ans < count then
        ans = count
        count = 0
      end
    end
  end
end
if ans < count then
  ans = count
end
print ans,"\n"