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:
['311', '147', 'a', '149', 'h']
answer:
1, 3, 4, 7, 9


question:
['221', '191', 'w', 'l', 'h', 'a']
answer:
1, 2, 9


question:
['q', '477', 'z', 'r', 'v']
answer:

4, 7