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:
['169', '159', '103', '245', '449', 'a', 'w', 'b', '131', '385']
answer:
0, 1, 2, 3, 4, 5, 6, 8, 9


question:
['381', 'l', 'z', '323', 'x', '247', '11']
answer:
1, 2, 3, 4, 7, 8


question:
['z', '175']
answer:

1, 5, 7