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:
['a', '491', '477', '193', 'b', 'l', 'c']
answer:
1, 3, 4, 7, 9


question:
['v', '105', 'p', 'w', '295', '239', '453']
answer:
0, 1, 2, 3, 4, 5, 9


question:
['k', 'a', 'v', 'c', '195']
answer:

1, 5, 9