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: ['161', '433', '373', '225', '161', 'b', '179', '311', 'f', '325', 'y', 'c', 'h', '87']

Answer: 1, 2, 3, 4, 5, 6, 7, 8, 9


Question: ['u', '207', 'q', '371', 's', '51', '217', 'q', '255', '9', '109', 'l', 'b', 'w']

Answer: 0, 1, 2, 3, 5, 7, 9


Question: ['d', '247', '343', 'k', '309', 'o', 'w', '327', 'v']

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