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]: ['k', '373', 'b', '305', 'i', 'n', 'z', 'm', 'c']
[A]: 0, 3, 5, 7


[Q]: ['n', 'm', 'u', '267']
[A]: 2, 6, 7


[Q]: ['g', '473', '45']
[A]:
3, 4, 5, 7