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_15331868_1 (won INTEGER, points VARCHAR)
### Question:
What is the highest number won when the number of points is 31?
### Answer:
SELECT MAX(won) FROM table_15331868_1 WHERE points = 31