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]: ['b', 'm', '471']
[A]: 1, 4, 7


[Q]: ['279', 't', 'e', 'j', '437', '167', 's', 'n']
[A]: 1, 2, 3, 4, 6, 7, 9


[Q]: ['c', '235', '403', 'r', 't', 'c', '467', '179', 'f', '467', 'l', '171', '445']
[A]:
0, 1, 2, 3, 4, 5, 6, 7, 9