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.

[EX Q]: ['279', '115']
[EX A]: 1, 2, 5, 7, 9

[EX Q]: ['293', '473', '79', 'j', '455', '285', 'k', 'd', '379', '249', '73', '229']
[EX A]: 2, 3, 4, 5, 7, 8, 9

[EX Q]: ['q', '221', '19', 'n', '417']
[EX A]:
1, 2, 4, 7, 9