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:
['129', '373', '461', 'h', 'r', '163', '361', '483', '463', 'e', 'z', 'l']
answer:
1, 2, 3, 4, 6, 7, 8, 9


question:
['421', '99', '115', 'x']
answer:
1, 2, 4, 5, 9


question:
['95', 's', 'g', 'a', 'i', '37', 'w', '73', '487']
answer:

3, 4, 5, 7, 8, 9