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:
['411', '367']
answer:
1, 3, 4, 6, 7


question:
['43', 'd']
answer:
3, 4


question:
['285', 'w', '37', '471', 'y', '435', '27', '415', 'f', 's', '27', 'b']
answer:

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