class Header:
   """
   Class represents header (all types - title, chapter, section, subsection) and its word counts
   """
   def __init__(self, header_type):
       self.type = header_type  # title, chapter, section, subsection
       self.words = []
       self.header_count = 0
       self.text_count = 0
       self.caption_count = 0

   def add_header_word(self, word):
       self.words.append(word)
       self.header_count += 1

   def add_text_word(self):
       self.text_count += 1

   def add_caption_word(self):
       self.caption_count += 1

   def __str__(self):
       result = "  " + self.type + " ("
       result += str(self.header_count) + " + " + str(self.text_count) + " + " + str(self.caption_count) + ")"
       for word in self.words:
           result += " " + word
       return result