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: ['i', '249', '287']

A: 2, 4, 7, 8, 9
****
Q: ['e', '325', '377', 'v', '35', 'n', '125', '195']

A: 1, 2, 3, 5, 7, 9
****
Q: ['w', 'o', '467', 'v', 'x', 'o']

A:
4, 6, 7
****