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: ['a', '491', '477', '193', 'b', 'l', 'c']

A: 1, 3, 4, 7, 9
****
Q: ['v', '351', 's', 'f', 'd', '137', '11', '355', '345', 'm', 's', '165', '97', '225']

A: 1, 2, 3, 4, 5, 6, 7, 9
****
Q: ['15', 'c', 'q', 'd']

A:
1, 5
****