code: def custom_prompt(msg, options, default):
      
      formatted_options = [
          x.upper() if x == default else x.lower() for x in options
      ]
      sure = input("{0} [{1}]: ".format(msg, "/".join(formatted_options)))
      if len(sure) == 0:
          return default
      for option in options:
          if sure.upper() == option.upper():
              return option
      return default
docs: Prompts the user with custom options.