s = gets.chomp

i = s.index("ccw")
if i == nil
  puts 0
  exit
end

count = 0
loop do
  i = s.index("ccw")
  break if i == nil
  m = s.length / 2
  if i <= m
    s[0] = ""
  else
    s[-1] = ""
  end
  count += 1
end
puts count