code: def test_step1c():
      word_str_ser_ls = ["happy", "sky", "enjoy", "boy", "toy", "y"]
      word_str_ser = cudf.Series(word_str_ser_ls)
      st = PorterStemmer()
      got = st._step1c(word_str_ser)
  
      expect = ["happi", "ski", "enjoy", "boy", "toy", "y"]
      assert list(got.to_pandas().values) == expect
  
      # mask test
      expect = ["happi", "sky", "enjoy", "boy", "toy", "y"]
      mask = cudf.Series([True, False, False, False, False, True])
      got = st._step1c(word_str_ser, mask)
      assert list(got.to_pandas().values) == expect
  
file_path: cuml/python/cuml/tests/stemmer_tests/test_steps.py
imports: from cuml.preprocessing.text.stem.porter_stemmer import PorterStemmer
  from cuml.internals.safe_imports import gpu_only_import
label_desc: Use image node_id 3 for calling a global function with example usage: test_step1c() without return types