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: ['v', '477', 'j', '339', '245', 'r', '417', 'g', '475', 'n', 'q', '171']

A: 1, 2, 3, 4, 5, 7, 9
****
Q: ['51', '461', '343', '15', '209', '51']

A: 0, 1, 2, 3, 4, 5, 6, 9
****
Q: ['265', '497', '371', 'k', 'c', 'b', '113', 'm', 'e', 'i', 'r', '437', 'x']

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