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:
['w', '13', 'b', '455', 'b', 'k']
answer:
1, 3, 4, 5


question:
['f', '135', 's', '269', 'x', '45', 'p', '141', 'e']
answer:
1, 2, 3, 4, 5, 6, 9


question:
['49', 'm', '393', 'u', '379', '497', '327', 't', 'l', '349', 'e', 'y', '163']
answer:

1, 2, 3, 4, 6, 7, 9