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', '115']
1, 2, 5, 7, 9

['255', '19', '335', '483', 'r', 'c', 'r', 'o', '189', '71', '379', 'l', 'b']
1, 2, 3, 4, 5, 7, 8, 9

['391', '369', '343', 'z', '295', '445']

1, 2, 3, 4, 5, 6, 9