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]: ['217', 'c', 'h', 'e', 't', '331', '69']
[EX A]: 1, 2, 3, 6, 7, 9

[EX Q]: ['153', 'b', 'w', 'y', 'k', '385', '221', '153', 'b', '123', 'd', '151', 'y']
[EX A]: 1, 2, 3, 5, 8

[EX Q]: ['155', 'p']
[EX A]:
1, 5