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: ['291', '445', 'q', 't']

A: 1, 2, 4, 5, 9
****
Q: ['109', 'b']

A: 0, 1, 9
****
Q: ['n', 'o', 's', 'p']

A:
-1
****