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:
['x', 'a', '381', 'k', 'n', 'm', '267', 'r', '193', 'f', 'h', 'r', '327', 'i', 'h']
answer:
1, 2, 3, 6, 7, 8, 9


question:
['257', '111', 'g', '277', '473', '105', 'x', '217']
answer:

0, 1, 2, 3, 4, 5, 7