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:
['e', '307', '191', 'k', 'o', 'j', '99']
answer:
0, 1, 3, 7, 9


question:
['k', 'b', 'k', 'l', '441', 'b', '115', 'd', 'b', 'r', '115', 'k', 'a']
answer:
1, 4, 5


question:
['w', 'p', '127', '43', '31', 'e', 'w', 'l']
answer:

1, 2, 3, 4, 7