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]: ['397', 'x', 'e', '179', '105', '381']
[EX A]: 0, 1, 3, 5, 7, 8, 9

[EX Q]: ['o', '235', '479', 'e', '199', 'c', '25', '59', 'g', '415', '201', '129', 'a', 'i', 'c']
[EX A]: 0, 1, 2, 3, 4, 5, 7, 9

[EX Q]: ['373', '303', '281', '121', 'e', 'l', 'j', 'g', 't', '207', '177', '13', 'x']
[EX A]:
0, 1, 2, 3, 7, 8