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]: ['y', 'b']
[A]: -1


[Q]: ['243', '125']
[A]: 1, 2, 3, 4, 5


[Q]: ['v', '127', 'p', 'y', 'p', 'b', 'm', '179', 'p', '17', 'i', '1', 's', '471']
[A]:
1, 2, 4, 7, 9