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]: ['185', '425']
[EX A]: 1, 2, 4, 5, 8

[EX Q]: ['165', 'k', 'a', 'v', 'u', '61', '327']
[EX A]: 1, 2, 3, 5, 6, 7

[EX Q]: ['473', 'z']
[EX A]:
3, 4, 7