code: def __init__(self, text, size_word):
      self.text = text
      self.hash = 0
      self.size_word = size_word
  
      for i in range(0, size_word):
          # ord maps the character to a number
          # subtract out the ASCII value of "a" to start the indexing at zero
          self.hash += (ord(self.text[i]) - ord("a") + 1) * (
              26 ** (size_word - i - 1)
          )
  
      # start index of current window
      self.window_start = 0
      # end of index window
      self.window_end = size_word
  
label_desc: Use image node_id 1 to create a new RollingHash object  with example: obj = RollingHash(text, size_word)