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:
['149', 'o', '237', 't', 'k', 'w']
answer:
1, 2, 3, 4, 7, 9


question:
['499', '493', 'i', '87']
answer:
3, 4, 7, 8, 9


question:
['i', 'q', 'i', '1', '255', '179', '77', 'u', '21', '181', '241', '393', '83']
answer:

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