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_29 (draws INTEGER, points VARCHAR, wins VARCHAR)
### Question:
What was the biggest draws, for wins under 4, and points of 20-18?
### Answer:
SELECT MAX(draws) FROM table_name_29 WHERE points = "20-18" AND wins < 4