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.

[Q]: ['473', '449', '357', 'p', 'p', 'e', '377', '77']
[A]: 3, 4, 5, 7, 9


[Q]: ['397', '287', '401', '97']
[A]: 0, 1, 2, 3, 4, 7, 8, 9


[Q]: ['x', '227', '467', 'c', 'r', 'm', 'k', 'f', '203', 'n', 'h', '399', 'u', 'p']
[A]:
0, 2, 3, 4, 6, 7, 9