text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_name_33 (prr_class VARCHAR, wheel_arrangement VARCHAR)
  ### Question:
  What PRR class has a Wheel arrangement of a1a-a1a?
  ### Answer:
  SELECT prr_class FROM table_name_33 WHERE wheel_arrangement = "a1a-a1a"