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:
['i', 'f', '409', 'c', '83']
answer:
0, 3, 4, 8, 9


question:
['a', '399', 's', 'e', '495', 'd', 'f', 'a', '323']
answer:
2, 3, 4, 5, 9


question:
['g', '475', 'e', 't', '49']
answer:

4, 5, 7, 9