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:
['z', '271', 'h', 'm', '365']
answer:
1, 2, 3, 5, 6, 7


question:
['n', 'm', 'u', '267']
answer:
2, 6, 7


question:
['e', 'c', '479', 't', '111']
answer:

1, 4, 7, 9