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:
['247', 's', 'y', 'c', '421']
answer:
1, 2, 4, 7


question:
['493', '241', '239', 'g', 'q', '319', '49', '245']
answer:
1, 2, 3, 4, 5, 9


question:
['215', '209', '19', 'e', '303', '27', 'm']
answer:

0, 1, 2, 3, 5, 7, 9