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:
['213', '51', '31', 'n', '89', '113', '315', '195', 'd', 'x', '105', '217', '295']
answer:
0, 1, 2, 3, 5, 7, 8, 9


question:
['411', 'n']
answer:
1, 4


question:
['251', '129', '209', 'v', 'l', 'o', 'c']
answer:

0, 1, 2, 5, 9