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:
['141', 'm', '139', '197', '321', '265', 'p']
answer:
1, 2, 3, 4, 5, 6, 7, 9


question:
['455', '447', 'x', '479', 'b', '267', '339', '29', '267']
answer:
2, 3, 4, 5, 6, 7, 9


question:
['v', 't', 'a', 'k', '93', 'h', '249', '355']
answer:

2, 3, 4, 5, 9