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]: ['t', '493', 's', 'f', '279', 'f']
[A]: 2, 3, 4, 7, 9


[Q]: ['i', 'e', '17', 'q', '15', 'v']
[A]: 1, 5, 7


[Q]: ['s', '103', 'y', '207', 'v', 'y', 'o', 'n', '175']
[A]:
0, 1, 2, 3, 5, 7