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.
['q', 'm', '209', 'm', '491', 'z', 'k', '265', 'i', '331']
A:
0, 1, 2, 3, 4, 5, 6, 9