Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What was the biggest draws, for wins under 4, and points of 20-18?

### Inputs:
table_name: table, columns: ['Position', 'Club', 'Played', 'Points', 'Wins', 'Draws', 'Losses', 'Goals for', 'Goals against', 'Goal Difference']

### Response:
SELECT MAX Draws FROM table WHERE Points = 20-18 AND Wins < 4