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]: ['l', 'n', '477', '227', '71', 'p', 'q', '277', '135', 'i']
[EX A]: 1, 2, 3, 4, 5, 7

[EX Q]: ['459', 'd', '473', 'i', 'l', 's']
[EX A]: 3, 4, 5, 7, 9

[EX Q]: ['n', 'f', '369', '373', '209']
[EX A]:
0, 2, 3, 6, 7, 9