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]: ['299', '199']
[EX A]: 1, 2, 9

[EX Q]: ['239', '439']
[EX A]: 2, 3, 4, 9

[EX Q]: ['n', 'b', 'o', '1', 'g', 'c', 'i', '1', 'u', 'z', '227', 'w', '283']
[EX A]:
1, 2, 3, 7, 8