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:
['c', 'h', '151', 'g', 'd', 'd', 'k', '37']
answer:
1, 3, 5, 7


question:
['59', '437', '145', '165', '217', 'l', '185', '495', 'z']
answer:
1, 2, 3, 4, 5, 6, 7, 8, 9


question:
['149', 'o', '237', 't', 'k', 'w']
answer:

1, 2, 3, 4, 7, 9