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]: ['497', '247', 'v', '327', '237', '257', '475', 's', '335', 'k']
[A]: 2, 3, 4, 5, 7, 9


[Q]: ['w', 't', 'a', '199', '385']
[A]: 1, 3, 5, 8, 9


[Q]: ['23', '307', '471']
[A]:
0, 1, 2, 3, 4, 7