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]: ['499', '493', 'i', '87']
[EX A]: 3, 4, 7, 8, 9

[EX Q]: ['y', '301', 'c', 'l', 'x', '257', 'l', '1', 'r', '127', 'f', '157', '91', '423']
[EX A]: 0, 1, 2, 3, 4, 5, 7, 9

[EX Q]: ['s', 'o', 'k']
[EX A]:
-1