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: ['t', '175', '163', 'k', '279', '385', 'y', '71', 'g']

A: 1, 2, 3, 5, 6, 7, 8, 9
****
Q: ['181', 'n', 'p', '349', '321', '457', 'h', 's', 't', 'k', 'x', 'a', '145', '135', 'u']

A: 1, 2, 3, 4, 5, 7, 8, 9
****
Q: ['221', 'g', '27', 'l', '337', '497']

A:
1, 2, 3, 4, 7, 9
****