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:
['h', '281', 'x', '471']
answer:
1, 2, 4, 7, 8


question:
['411', '367']
answer:
1, 3, 4, 6, 7


question:
['s', 'r', '449', 'g', 'o', '55', '217', '307', '385', 'y', '325', '101', '379', '103', '179']
answer:

0, 1, 2, 3, 4, 5, 7, 8, 9