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.

[EX Q]: ['439', '443', '175', 'e', 'm', '361', 'd']
[EX A]: 1, 3, 4, 5, 6, 7, 9

[EX Q]: ['r', '495', '383', 'd', '369', '323', 'e', 'c', '149', 'q', '487', 'q', 'c']
[EX A]: 1, 2, 3, 4, 5, 6, 7, 8, 9

[EX Q]: ['b', 'k', 'r', 'n']
[EX A]:
-1