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:
['h', '475', 'x', '53', '461', 'c']
answer:
1, 3, 4, 5, 6, 7


question:
['213', '115', 'm', '363', 'z', '473', 'j', 'x', '189']
answer:

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