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.

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


[Q]: ['j', '195', 'u', '55']
[A]: 1, 5, 9


[Q]: ['b', '235', '235', 't', 'x', 'm']
[A]:
2, 3, 5