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.

Q: ['h', '281', 'x', '471']

A: 1, 2, 4, 7, 8
****
Q: ['d', '351', '357', 'q', 'b', '19', 'r', '231', '381', 'x', 'a', 'y', '263']

A: 1, 2, 3, 5, 6, 7, 8, 9
****
Q: ['w', '487']

A:
4, 7, 8
****