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]: ['215', '391', '251', '177']
[EX A]: 1, 2, 3, 5, 7, 9

[EX Q]: ['425', 'a', '351', 'v']
[EX A]: 1, 2, 3, 4, 5

[EX Q]: ['349', '99', '115', 'o', '427', 'g', 'k', 't']
[EX A]:
1, 2, 3, 4, 5, 7, 9