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:
['h', '281', 'x', '471']
answer:
1, 2, 4, 7, 8


question:
['397', 'x', 'e', '179', '105', '381']
answer:
0, 1, 3, 5, 7, 8, 9


question:
['283', '493', 's', '33', '175', '269', '395']
answer:

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