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:
['y', '439', 't', '29', '425', '289']
answer:
2, 3, 4, 5, 8, 9


question:
['187', '461', 'b']
answer:
1, 4, 6, 7, 8


question:
['457', 'd']
answer:

4, 5, 7