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:
['165', 'k', 'a', 'v', 'u', '61', '327']
answer:
1, 2, 3, 5, 6, 7


question:
['w', '19', '61', 'j', 'o', 's', 'q', '391', '281', '491', '287']
answer:
1, 2, 3, 4, 6, 7, 8, 9


question:
['125', 's', '33', '309', 'a', '481']
answer:

0, 1, 2, 3, 4, 5, 8, 9