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.

['355', 'h', '287', 's', 'o', '497', '219']
1, 2, 3, 4, 5, 7, 8, 9

['487', 'x']
4, 7, 8

['k', '473', 'm', 'u']

3, 4, 7