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.
--------
Question: ['s', 't', '189', 'j', 'r']

Answer: 1, 8, 9


Question: ['181', 'n', 'p', '349', '321', '457', 'h', 's', 't', 'k', 'x', 'a', '145', '135', 'u']

Answer: 1, 2, 3, 4, 5, 7, 8, 9


Question: ['t', 'n', '387', '295', '403', 'c', '39', 'l', 'v', '7', '423', 's', '347']

Answer:
0, 2, 3, 4, 5, 7, 8, 9