code: def closest_hendecasyllable_patterns(self, scansion: str) -> List[str]:
          
          return self._closest_patterns(self.VALID_HENDECASYLLABLES, scansion)
docs: Find the closest group of matching valid hendecasyllable patterns.
  
          :return: list of the closest valid hendecasyllable patterns; only candidates with a matching
          length/number of syllables are considered.
  
          >>> print(MetricalValidator().closest_hendecasyllable_patterns('UU-UU-U-U-X'))
          ['-U-UU-U-U-X', 'U--UU-U-U-X']