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


question:
['f', 'f', '149', '311', '331', 'l', 'u', '349', 'v', 'v', '417', '285']
answer:
1, 2, 3, 4, 5, 7, 8, 9


question:
['v', '123', 'd', 'f', '19', 'b', '479', 'i']
answer:

1, 2, 3, 4, 7, 9