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:
['173', 'i', 'w', '425', '27', 'd']
answer:
1, 2, 3, 4, 5, 7


question:
['z', 'b', 'c', 'l', '453', 'h', '215', '447', '487', 'p', 'y', 'v']
answer:
1, 2, 3, 4, 5, 7, 8


question:
['m', 'l', 'x', 'z', 'b', '29', '491', 'w', 'f', 'v', 't']
answer:

1, 2, 4, 9