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: ['177', '323', 'q', 'e', 'x', 'p', '3', 'c', 'e', '23', 's', '407', 'l', '21', 'z']

Answer: 0, 1, 2, 3, 4, 7


Question: ['45', '95', 'y', '363', '265', '307', '309', '423']

Answer: 0, 2, 3, 4, 5, 6, 7, 9


Question: ['s', '25', '447', '367', '207']

Answer:
0, 2, 3, 4, 5, 6, 7