instruction:
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:
['387', '7', '93', '105', '181']
answer:
0, 1, 3, 5, 7, 8, 9


question:
['431', '245', '23', 'c', '185', 'k', '155', '163', 'e', '35', 'r', '175', '163']
answer:
1, 2, 3, 4, 5, 6, 7, 8


question:
['263', 'i', 'b', '95', '185', 'g', 'j', 'u']
answer:

1, 2, 3, 5, 6, 8, 9