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: ['149', '129', 'k']

A: 1, 2, 4, 9
****
Q: ['a', 'n', '423', 'y', 'y', 'u', '55', 'y', '295', '73', 't', 'p']

A: 2, 3, 4, 5, 7, 9
****
Q: ['l', '393', '219', 'o', 'u', '159', 'x', 's', '281']

A:
1, 2, 3, 5, 8, 9
****