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: ['157', 'k', 'o', 'a', '279', 'g']

A: 1, 2, 5, 7, 9
****
Q: ['497', '21', '239', '487', '149', 'q']

A: 1, 2, 3, 4, 7, 8, 9
****
Q: ['w', 'k', '173', 't', 't', '281', '293', '45', '199', 'r']

A:
1, 2, 3, 4, 5, 7, 8, 9
****