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: ['411', 'n']

A: 1, 4
****
Q: ['x', '325', 'i', 'n', 'i', 'w', 't']

A: 2, 3, 5
****
Q: ['333', 'p', 'i', 'o', 'x', 'q', '31']

A:
1, 3
****