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]: ['381', '129']
[EX A]: 1, 2, 3, 8, 9

[EX Q]: ['25', 'b', '455', 'n', '305', '271']
[EX A]: 0, 1, 2, 3, 4, 5, 7

[EX Q]: ['291', 'h', '261', '121', '63', '451', '255', 's']
[EX A]:
1, 2, 3, 4, 5, 6, 9