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]: ['s', '45']
[A]: 4, 5


[Q]: ['49', 'r', '179', 'h', 'q', 'h', 'w', '187', '427', 'x', 'r']
[A]: 1, 2, 4, 7, 8, 9


[Q]: ['h', '171', 'j', '447', '267', '471', '121', '367', 'z', '143', '125', '23', 'x']
[A]:
1, 2, 3, 4, 5, 6, 7