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:
['311', '147', 'a', '149', 'h']
answer:
1, 3, 4, 7, 9


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


question:
['b', '383', 'n', 'i', 'h', 'm', 'j', '437']
answer:

3, 4, 7, 8