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: ['t', 'y', '331']

A: 1, 3
****
Q: ['q', 'u', '199', 'v', '249']

A: 1, 2, 4, 9
****
Q: ['381', '279']

A:
1, 2, 3, 7, 8, 9
****