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: ['345', 'k']

A: 3, 4, 5
****
Q: ['159', 'y', '369', 'r', '341', '23', 's', '209', 'l', 's', '473']

A: 0, 1, 2, 3, 4, 5, 6, 7, 9
****
Q: ['m', 'r', 'i', 'm', '71', 'q', 'n', 'x', '281', '351']

A:
1, 2, 3, 5, 7, 8
****