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:
['c', '31', '49', 'x', 'n', 'i', 'a', '135', '65', '401', 'b', '213', 'f', '321']
answer:
0, 1, 2, 3, 4, 5, 6, 9


question:
['v', 'j', 'l', 'f', 'n', '185', 'x', '367']
answer:
1, 3, 5, 6, 7, 8


question:
['k', '233', 'h', 'd', 's', '83', '149', 'p', 'm']
answer:

1, 2, 3, 4, 8, 9


