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

### Instruction:
What county has an IHSAA Football Class of A, and a Mascot of royals?

### Inputs:
table_name: table, columns: ['School', 'Location', 'Mascot', 'Enrollment', 'IHSAA Football Class', 'Primary Conference', 'County']

### Response:
SELECT County FROM table WHERE IHSAA Football Class = a AND Mascot = royals