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

### Instruction:
What is the average number of losses for teams with under 4 losses and under 21 points?

### Inputs:
table_name: table, columns: ['Position', 'Name', 'Played', 'Drawn', 'Lost', 'Points']

### Response:
SELECT AVG Drawn FROM table WHERE Lost < 4 AND Points < 21