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.

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

['h', '281', 'x', '471']
1, 2, 4, 7, 8

['q', '149', 'h', '223', '47', '291', 'k']

1, 2, 3, 4, 7, 9