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: ['387', '7', '93', '105', '181']

A: 0, 1, 3, 5, 7, 8, 9
****
Q: ['r', '495', '383', 'd', '369', '323', 'e', 'c', '149', 'q', '487', 'q', 'c']

A: 1, 2, 3, 4, 5, 6, 7, 8, 9
****
Q: ['471', 'l']

A:
1, 4, 7
****