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:
['343', 'c', '7', '271', 'm', '151', 'd', 'n', '305', 'y', 'w', '255']
answer:
0, 1, 2, 3, 4, 5, 7


question:
['q', 'y', '49', '497', 'a', 'f', 'v', 'x', 'f', '347', '183', '489']
answer:
1, 3, 4, 7, 8, 9


question:
['385', '137', '423', 'w', 'b', 'n']
answer:

1, 2, 3, 4, 5, 7, 8