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:
['257', '111', 'g', '277', '473', '105', 'x', '217']
answer:
0, 1, 2, 3, 4, 5, 7


question:
['v', 't', '81', '223', 'b', 'b', '313', '151', '63']
answer:
1, 2, 3, 5, 6, 8


question:
['c', '31', '49', 'x', 'n', 'i', 'a', '135', '65', '401', 'b', '213', 'f', '321']
answer:

0, 1, 2, 3, 4, 5, 6, 9