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

### Instruction:
What's the highest against score that drew more than 5, and had more than 18 points?

### Inputs:
table_name: table, columns: ['Position', 'Team', 'Points', 'Played', 'Drawn', 'Lost', 'Against', 'Difference']

### Response:
SELECT MAX Against FROM table WHERE Drawn > 5 AND Points > 18