Q: 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.
['15', 'b', '357', '481', '229', '79', 'j', '141', '465', 'o', 'n', 'r']
A:
1, 2, 3, 4, 5, 6, 7, 8, 9