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:
['z', 'z', '273']
answer:
2, 3, 7


question:
['u', '343', '167', 'a']
answer:
1, 3, 4, 6, 7


question:
['i', '37', '157', 'm']
answer:

1, 3, 5, 7