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]: ['43', '479', '317', 'w', '475', '255', '3', 'x']
[EX A]: 1, 2, 3, 4, 5, 7, 9

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

[EX Q]: ['t', 'a', 'd', 't', '69', 'y', '179', 'p', '75', 'r', 'x', '437']
[EX A]:
1, 3, 4, 5, 6, 7, 9