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:
['x', '343', '391', '381', 'q', '317', '403', '89', '271']
answer:
0, 1, 2, 3, 4, 7, 8, 9


question:
['k', '107', '333', '317', 'm', 'w', 'g', 'f']
answer:
0, 1, 3, 7


question:
['51', 't', 'u', 'd']
answer:

1, 5