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: ['71', 't', '267', 'x', 'l', '95', '439', '51', 'i', '497', '469', 'k', '341', 'y']

A: 1, 2, 3, 4, 5, 6, 7, 9
****
Q: ['437', 'e', 'b', 'f', '203', 't', '5', '461', 'e', '367', '391', '81']

A: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
****
Q: ['w', 't', 'u', 'm', 'y', '447', 'w', 'x']

A:
4, 7
****