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', 'e', '75', '379', 'c', 'f', 'g', '381', 'l', 'u', '197', '489']
answer:
1, 3, 4, 5, 7, 8, 9


question:
['z', 'c', 'n', '351', 'f', '239', '71', '351', 'b', '1', '321', 'h', '163']
answer:
1, 2, 3, 5, 6, 7, 9


question:
['j', 'p', 'z', 'p', '443', '237', 'c']
answer:

2, 3, 4, 7