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.

['157', 'k', 'o', 'a', '279', 'g']
1, 2, 5, 7, 9

['219', 'v', '295', '291', 'n', 'a', '133', 'a', 'y', 'i', 'e', '235', '461']
1, 2, 3, 4, 5, 6, 9

['k', '21']

1, 2