Q: In this task, you are given an input list A. You need to extract and sort the unique digits used in the list in ascending order. Return -1 if there is no digit in the list.
['327', '377', 'q', 'p', '47', '389', 'q', '443', 'i', '203', 'b']
A:
0, 2, 3, 4, 7, 8, 9