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]: ['n', '149', 'z', '37']
[A]: 1, 3, 4, 7, 9


[Q]: ['477', 'a', 'n', 'r', '457', 'g', 'c']
[A]: 4, 5, 7


[Q]: ['447', 'e']
[A]:
4, 7