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]: ['479', 's', 'g']
[A]: 4, 7, 9


[Q]: ['q', 'a', '149']
[A]: 1, 4, 9


[Q]: ['e', 'm', 'p', 'n', 'g']
[A]:
-1