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: ['l', 'n', '477', '227', '71', 'p', 'q', '277', '135', 'i']

A: 1, 2, 3, 4, 5, 7
****
Q: ['411', '367']

A: 1, 3, 4, 6, 7
****
Q: ['t', 'p', 'j', 'x', 'k', '295', '221', '261', '221', 'b', '431', '427']

A:
1, 2, 3, 4, 5, 6, 7, 9
****