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:
['131', '483', 'k', '387', '451', 'j']
answer:
1, 3, 4, 5, 7, 8


question:
['221', '191', 'w', 'l', 'h', 'a']
answer:
1, 2, 9


question:
['333', '207', '13', '339', 'n', '387']
answer:

0, 1, 2, 3, 7, 8, 9


