code: def _ends_in_cvc(self, term):
          
          return len(term) > 2 and (
              term[-1] not in self._vowels
              and term[-2] in self._vowels
              and term[-3] not in self._vowels
              and term[-1] not in tuple('wxY')
          )
docs: Return Porter helper function _ends_in_cvc value.
  
          Parameters
          ----------
          term : str
              The word to scan for cvc
  
          Returns
          -------
          bool
              True iff the stem ends in cvc (as defined in the Porter stemmer
              definition)