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: ['397', '287', '401', '97']

A: 0, 1, 2, 3, 4, 7, 8, 9
****
Q: ['431', '245', '23', 'c', '185', 'k', '155', '163', 'e', '35', 'r', '175', '163']

A: 1, 2, 3, 4, 5, 6, 7, 8
****
Q: ['r', 'z', 's', '19', 'u', 'i', 'o', 'p', '373', '107', '253']

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