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: ['c', '471', 'l', 'z', '23', 'c', '43', 'o', '175', 'w', 'c', 'p', '431']

A: 1, 2, 3, 4, 5, 7
****
Q: ['255', 'u', 's', 'g', '445']

A: 2, 4, 5
****
Q: ['p', 'u']

A:
-1
****