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.

['447', 'k', '237', 'e', '385', '11', '431', 'm', 'p', '81', '391', 'y', '275', 'k', '323']
1, 2, 3, 4, 5, 7, 8, 9