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: ['7', 'n', '443', '131', '189', '187', '261', '451', '449', 'o', 'i', 't', '15']

A: 1, 2, 3, 4, 5, 6, 7, 8, 9
****
Q: ['247', 's', 'y', 'c', '421']

A: 1, 2, 4, 7
****
Q: ['a', 'i']

A:
-1
****