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: ['255', 'u', 's', 'g', '445']

A: 2, 4, 5
****
Q: ['361', '47', 'k', '33']

A: 1, 3, 4, 6, 7
****
Q: ['169', 'e', 'v', '331', 'm', 'a', 'z', '263', 'k', '115']

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