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: ['169', '159', '103', '245', '449', 'a', 'w', 'b', '131', '385']

Answer: 0, 1, 2, 3, 4, 5, 6, 8, 9


Question: ['165', 'k', 'a', 'v', 'u', '61', '327']

Answer: 1, 2, 3, 5, 6, 7


Question: ['w', 'v', 's', '231', '497', 'w', 'f']

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