code: def fix_title_capitalization(title):
      
      if re.search("[A-Z]", title) and re.search("[a-z]", title):
          return title
      word_list = re.split(' +', title)
      final = [word_list[0].capitalize()]
      for word in word_list[1:]:
          if word.upper() in COMMON_ACRONYMS:
              final.append(word.upper())
          elif len(word) > 3:
              final.append(word.capitalize())
          else:
              final.append(word.lower())
      return " ".join(final)
docs: Try to capitalize properly a title string.