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

[EX Q]: ['i', 'f', '109']
[EX A]: 0, 1, 9

[EX Q]: ['n', 'm', '265', 'v']
[EX A]:
2, 5, 6