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.

['279', 't', 'e', 'j', '437', '167', 's', 'n']
1, 2, 3, 4, 6, 7, 9

['k', '135', '297']
1, 2, 3, 5, 7, 9

['b', 'k', 's', 'u']

-1