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]: ['q', 'p', 'y', 'p', 'k', 'r', '481', 'v']
[EX A]: 1, 4, 8

[EX Q]: ['9', '129', '467', '59', 'm', 'n', 'd', '107']
[EX A]: 0, 1, 2, 4, 5, 6, 7, 9

[EX Q]: ['319', 'v', '491', '449', '303', 'c']
[EX A]:
0, 1, 3, 4, 9