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]: ['223', '71']
[EX A]: 1, 2, 3, 7

[EX Q]: ['b', '351', 'g', 'k', '29', '15', '411', '97', 'r', '27', '279']
[EX A]: 1, 2, 3, 4, 5, 7, 9

[EX Q]: ['s', '443', '239', 't', '99']
[EX A]:
2, 3, 4, 9