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:
['477', '293', '301', '269', '149', 'm']
answer:
0, 1, 2, 3, 4, 6, 7, 9


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


question:
['285', '359', 'r', 'y', 'k']
answer:

2, 3, 5, 8, 9