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

### Instruction:
Playoffs of league champs, and a Record of 77-63 is in what league?

### Inputs:
table_name: table, columns: ['Year', 'League', 'Class', 'Record', 'Finish', 'Manager', 'Playoffs']

### Response:
SELECT League FROM table WHERE Playoffs = league champs AND Record = 77-63