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.

['479', 's', 'g']
4, 7, 9

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

['373', 'e', 'a', 'w']

3, 7