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: ['43', 'd']

A: 3, 4
****
Q: ['197', 'q']

A: 1, 7, 9
****
Q: ['397', '99', 'o', 'k', 'r', 'f', 'd']

A:
3, 7, 9
****