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_15608800_2 (number_at_march VARCHAR, class VARCHAR)
### Question:
Name the number at march when class is j66
### Answer:
SELECT number_at_march FROM table_15608800_2 WHERE class = "J66"