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:
['t', '175', '163', 'k', '279', '385', 'y', '71', 'g']
answer:
1, 2, 3, 5, 6, 7, 8, 9


question:
['219', '127', '449', 'u', 'g']
answer:
1, 2, 4, 7, 9


question:
['427', '323', '245', '95', 'n', '427', 'd', '259', 'e', '331', 'g']
answer:

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