old_contents: def checkio(words):
      return '111' in ''.join('1' if w.isalpha() else '0' for w in words.split())
  
new_contents: def checkio(words):
      return '111' in ''.join('1' if w.isalpha() else '0' for w in words.split())
  
  
  # alt
  from re import findall, I
  def checkio(words):
      return bool(findall('([a-z]+ +){2,}[a-z]+', words, flags=I))
  
subject: Update three-words.py