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.

['y', 'b']
-1

['1', 'm']
1

['f', '71', '157', '15', 'i', '383', 'k', '121', '85']

1, 2, 3, 5, 7, 8

