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:
['215', '391', '251', '177']
answer:
1, 2, 3, 5, 7, 9


question:
['189', 'z']
answer:
1, 8, 9


question:
['327', 'j', 'e', 'i', '481', '87', 'v', 'i', 'w']
answer:

1, 2, 3, 4, 7, 8