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:
['299', '199']
answer:
1, 2, 9


question:
['h', 't', '371', 'e', '153', 'b']
answer:
1, 3, 5, 7


question:
['287', 'z', 'm', 'c', '335', '129', '155', '291', 'c']
answer:

1, 2, 3, 5, 7, 8, 9