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:
['487', 'x']
answer:
4, 7, 8


question:
['131', '483', 'k', '387', '451', 'j']
answer:
1, 3, 4, 5, 7, 8


question:
['r', '495', '383', 'd', '369', '323', 'e', 'c', '149', 'q', '487', 'q', 'c']
answer:

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