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:
['99', '245', 'c', '435', '255', 'v']
answer:
2, 3, 4, 5, 9


question:
['i', 'f', '109']
answer:
0, 1, 9


question:
['y', '265', '195', 'k', '253']
answer:

1, 2, 3, 5, 6, 9