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

### Instruction:
What's the mean game number for the olympiacos team when there's less than 17 rebounds?

### Inputs:
table_name: table, columns: ['Rank', 'Name', 'Team', 'Games', 'Rebounds']

### Response:
SELECT AVG Games FROM table WHERE Team = olympiacos AND Rebounds < 17