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:
['181', 'n', 'p', '349', '321', '457', 'h', 's', 't', 'k', 'x', 'a', '145', '135', 'u']
answer:
1, 2, 3, 4, 5, 7, 8, 9


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


question:
['433', '411', 'n', '241', 'g', 'r', 'd', 's', 'u', 'n', '395', 'u']
answer:

1, 2, 3, 4, 5, 9