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:
['k', 'x', '299', 'a', 'y', '105', 's', '249', 'g', '439', 'k', '1', 'h', 'd', '43']
answer:
0, 1, 2, 3, 4, 5, 9


question:
['425', 'x', 'u', 'f', 'v', '481', 'm', 'y', '159', '1']
answer:
1, 2, 4, 5, 8, 9


question:
['99', 'i', '363', '57', 'o', '389', 'a', '343', '27', 't', '439', '211', '477', '159']
answer:

1, 2, 3, 4, 5, 6, 7, 8, 9