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:
['1', 'm']
answer:
1


question:
['289', 'f', 'y', 'n', '271', '223', 'v', 'p', 'v', 'w', '7', 'i', '195']
answer:
1, 2, 3, 5, 7, 8, 9


question:
['157', '481', 'n', 't', 'd', 'j']
answer:

1, 4, 5, 7, 8