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


question:
['447', '77', '337', 'i', '257', '477', 'l', 'm', '357', 'k', '293', '425', 's']
answer:
2, 3, 4, 5, 7, 9


question:
['p', '115', 'y', '313', 'z']
answer:

1, 3, 5