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

### Instruction:
What is the average medal total of the country who had 0 silver medals and participated in less than 15 games?

### Inputs:
table_name: table, columns: ['Games', 'First', 'Last', 'Gold', 'Silver', 'Bronze', 'Total', 'Best finish (first/last)']

### Response:
SELECT AVG Total FROM table WHERE Games < 15 AND Silver < 0