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]: ['v', '477', 'j', '339', '245', 'r', '417', 'g', '475', 'n', 'q', '171']
[EX A]: 1, 2, 3, 4, 5, 7, 9

[EX Q]: ['v', 'p', '113', '241', 's', 'q', 'b', '293', 'l', 'w', 'w', '127']
[EX A]: 1, 2, 3, 4, 7, 9

[EX Q]: ['y', '251', 't', 'x']
[EX A]:
1, 2, 5