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

### Instruction:
What are the counties represented in District 12.1 12a?

### Inputs:
table_name: table, columns: ['District', 'Counties Represented', 'Delegate', 'Party', 'First Elected', 'Committee']

### Response:
SELECT Counties Represented FROM table WHERE District = 12.1 12A