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: ['25', 'n', 'n', '481', 'w', '91', '251']

A: 1, 2, 4, 5, 8, 9
****
Q: ['q', 'g', 'z', '309']

A: 0, 3, 9
****
Q: ['471', 'x', 'b', 'p', '203', 'r', '225', '69', '71', 'w', 'u', '143', '339', '259']

A:
0, 1, 2, 3, 4, 5, 6, 7, 9
****