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:
['b', 'n', '369', '199', 'r', '165', '63', 'y', '331', '57']
answer:
1, 3, 5, 6, 7, 9


question:
['v', '467', 'm', '23', '479', '49', 'k', 'u', 'l', '119']
answer:
1, 2, 3, 4, 6, 7, 9


question:
['z', '149', '95', 'n', '255', 'i', 'q', '403', '351']
answer:

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