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


[Q]: ['381', '129']
[A]: 1, 2, 3, 8, 9


[Q]: ['s', '19', '273', '141', '321', '215', 'u', '351']
[A]:
1, 2, 3, 4, 5, 7, 9