code: def order_error(subtag, got, expected):
      
      options = SUBTAG_TYPES[expected:]
      if len(options) == 1:
          expect_str = options[0]
      elif len(options) == 2:
          expect_str = '%s or %s' % (options[0], options[1])
      else:
          expect_str = '%s, or %s' % (', '.join(options[:-1]), options[-1])
      got_str = SUBTAG_TYPES[got]
      raise LanguageTagError("This %s subtag, %r, is out of place. "
                             "Expected %s." % (got_str, subtag, expect_str))
docs: Output an error indicating that tags were out of order.