s = gets.strip.split('')

a = 0
n = s.size
M = 0

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

  b = a
  while a < n && s[a] == "…"
    a += 1
  end

  L = a - b
  if M < L
    M = L
  end
end

puts M