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:
['285', 'w', '37', '471', 'y', '435', '27', '415', 'f', 's', '27', 'b']
answer:
1, 2, 3, 4, 5, 7, 8


question:
['181', 'n', 'p', '349', '321', '457', 'h', 's', 't', 'k', 'x', 'a', '145', '135', 'u']
answer:
1, 2, 3, 4, 5, 7, 8, 9


question:
['u', 'v', '269', '179', '359', '425', '343', '377', 'm', '477', '357', '463', 'f', 'i', 'o']
answer:

1, 2, 3, 4, 5, 6, 7, 9