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]: ['39', '461', '163', '379', '331', '137', 'g', 'm']
[A]: 1, 3, 4, 6, 7, 9


[Q]: ['233', '37', '221', 'n', 'j', 'y', '381', '175']
[A]: 1, 2, 3, 5, 7, 8


[Q]: ['327', '67', 't', 'f']
[A]:
2, 3, 6, 7