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]: ['c', '317', 'z', 'z', 'h', '227', '439', 'x', 'f']
[EX A]: 1, 2, 3, 4, 7, 9

[EX Q]: ['325', '203', 'x', 'r', '189', 't', 'q', '277', '315', 'w', '377', 'g', 'l', '87', 'f']
[EX A]: 0, 1, 2, 3, 5, 7, 8, 9

[EX Q]: ['e', '97', '369', '397', 'g']
[EX A]:
3, 6, 7, 9