code: def parseInt(self, words):
          
          # Remove 'and', case-sensitivity
          words = words.replace(" and ", " ").lower()
          # 'a' -> 'one'
          words = re.sub(r'(\b)a(\b)', '\g<1>one\g<2>', words)
  
          def textToNumber(s):
              """
              Converts raw number string to an integer.
              Based on text2num.py by Greg Hewill.
              """
              a = re.split(r"[\s-]+", s)
              n = 0
              g = 0
              for w in a:
                  x = NumberService.__small__.get(w, None)
                  if x is not None:
                      g += x
                  elif w == "hundred":
                      g *= 100
                  else:
                      x = NumberService.__magnitude__.get(w, None)
                      if x is not None:
                          n += g * x
                          g = 0
                      else:
                          raise NumberService.NumberException(
                              "Unknown number: " + w)
              return n + g
  
          return textToNumber(words)
docs: Parses words to the integer they describe.
  
          Args:
              words (str): Description of the integer.
  
          Returns:
              An integer representation of the words.