text: Title: Move constants to top of file
  Body: The file `chatterbot/parsing.py` has three variables that should be moved closer to the top of the file to improve readability.
  
  The variables are named: `HASHMONTHS`, `HASHWEEKDAYS`, and `HASHORDINALS`.
  
  They should be placed below the existing constant called `NUMBERS` that is already located near the top of the file.