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]: ['149', 'o', '237', 't', 'k', 'w']
[EX A]: 1, 2, 3, 4, 7, 9

[EX Q]: ['p', '397', '439', '363', '379', '317', 'd', 'b']
[EX A]:
1, 3, 4, 6, 7, 9