code: def ends_cvc(string_ser, mode="NLTK_EXTENSIONS"):
      """Implements condition *o from the paper
  
      From the paper:
  
          *o  - the stem ends cvc, where the second c is not W, X or Y
                (e.g. -WIL, -HOP).
      """
  
      if mode == "NLTK_EXTENSIONS":
          # rule_1
          # len(word) >= 3
          # and self._is_consonant(word, len(word) - 3)
          # and not self._is_consonant(word, len(word) - 2)
          # and self._is_consonant(word, len(word) - 1)
          # and word[-1] not in ("w", "x", "y")
  
          len_flag = len_gt_n(string_ser, 2)
  
          first_consonant = is_consonant(string_ser, -3)
          middle_vowel = is_vowel(string_ser, -2)
          last_consonant = is_consonant(string_ser, -1)
  
          last_char_strs = string_ser.str.get(-1)
  
          # converting to series to all strings
          last_char_ser = cudf.Series(last_char_strs)
          last_char_flag = None
          for char in ["w", "x", "y"]:
              if last_char_flag is not None:
                  last_char_flag = last_char_flag & (
                      last_char_ser != char
                  )
              else:
                  last_char_flag = last_char_ser != char
  
          rule_1 = (
              len_flag
              & first_consonant
              & middle_vowel
              & last_consonant
              & last_char_flag
          )
          # rule_2
          # self.mode == self.NLTK_EXTENSIONS
          # and len(word) == 2
          # and not self._is_consonant(word, 0)
          # and self._is_consonant(word, 1)
          len_flag = len_eq_n(string_ser, 2)
          first_char = ~is_consonant(string_ser, 0)
          second_char = is_consonant(string_ser, 1)
          rule_2 = len_flag & first_char & second_char
  
          return rule_1 | rule_2
      else:
          assert NotImplementedError
  
imports: from .consonant_vowel_utils import is_vowel, is_consonant
  from .len_flags_utils import len_gt_n, len_eq_n
  from cuml.internals.safe_imports import gpu_only_import
label_desc: Use image node_id 4 for calling a global function with example usage: ends_cvc(string_ser, mode) and returns: unknown