code: def check(text):
      
      err = "strunk_white.greylist"
      msg = "Use of '{}'. {}"
  
      bad_words = [
          "obviously",
          "utilize"
      ]
  
      explanations = {
          "obviously":
          "This is obviously an inadvisable word to use.",
          "utilize":
          r"Do you know anyone who *needs* to utilize the word utilize?"
      }
  
      errors = []
      for word in bad_words:
          occ = [m for m in re.finditer(word, text.lower())]
          for o in occ:
              errors.append((
                  o.start(),
                  o.end(),
                  err,
                  msg.format(word, explanations[word]),
                  None))
  
      return errors
docs: Check the text.