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]: ['251', '173', '301', '339', '267', 'p', '347']
[EX A]: 0, 1, 2, 3, 4, 5, 6, 7, 9

[EX Q]: ['265', '251', '241', 'd', 'a', '59', '21', '385', '41', 'l', 'o', '205']
[EX A]: 0, 1, 2, 3, 4, 5, 6, 8, 9

[EX Q]: ['k', '141', '463']
[EX A]:
1, 3, 4, 6