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:
['187', '461', 'b']
answer:
1, 4, 6, 7, 8


question:
['k', 'b', 'k', 'l', '441', 'b', '115', 'd', 'b', 'r', '115', 'k', 'a']
answer:
1, 4, 5


question:
['115', 'd', '277', 'q', '143', '473', 'o', '433', 'v', 'w', 'w', '123', '405', 'k']
answer:

0, 1, 2, 3, 4, 5, 7