code: def _step5(self, word):
          
          if word[-1] == 'e':
              a = self._m(word, len(word)-1)
              if a > 1 or (a == 1 and not self._cvc(word, len(word)-2)):
                  word = word[:-1]
          if word.endswith('ll') and self._m(word, len(word)-1) > 1:
              word = word[:-1]
  
          return word
docs: step5() removes a final -e if m() > 1, and changes -ll to -l if
          m() > 1.