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.

['o', 'k', 'i']
-1

['345', 'k']
3, 4, 5

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

0, 1, 2, 3, 4, 7, 8, 9

