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.

['w', '13', 'b', '455', 'b', 'k']
1, 3, 4, 5

['51', '461', '343', '15', '209', '51']
0, 1, 2, 3, 4, 5, 6, 9

['207', '87']

0, 2, 7, 8