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]: ['343', 'c', '7', '271', 'm', '151', 'd', 'n', '305', 'y', 'w', '255']
[EX A]: 0, 1, 2, 3, 4, 5, 7

[EX Q]: ['149', 'o', '237', 't', 'k', 'w']
[EX A]: 1, 2, 3, 4, 7, 9

[EX Q]: ['429', '467', 'd']
[EX A]:
2, 4, 6, 7, 9