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:
['u', '157', '63', '411', 'x', 'c', 'k', 'z', 'i', '279', '311', '431']
answer:
1, 2, 3, 4, 5, 6, 7, 9


question:
['c', '435', 'c', 'q', 'u', '191', 'b', 'l', '217']
answer:
1, 2, 3, 4, 5, 7, 9


question:
['389', '219', 't', 'b', '431', '189', 'w', 'd', 'l']
answer:

1, 2, 3, 4, 8, 9