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:
['f', '463', '169', '175']
answer:
1, 3, 4, 5, 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:
['e', '271', 'g', 'q', 'n', '91', 't', 'c', 'o', '261', 'm', 'e', 'p']
answer:

1, 2, 6, 7, 9