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: ['y', 'b']

A: -1
****
Q: ['h', '281', 'x', '471']

A: 1, 2, 4, 7, 8
****
Q: ['153', '297', '155', 'l', '115', 'e', '377', 'p', 'z']

A:
1, 2, 3, 5, 7, 9
****