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: ['c', '155', '61']

A: 1, 5, 6
****
Q: ['375', '457', '423', 'q', 't']

A: 2, 3, 4, 5, 7
****
Q: ['a', '151']

A:
1, 5
****