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]: ['r', '171', 'p', '299', 'u', 'n', '421', '331', 'h', '21', 'h', 'x', '435', '327', '373']
[A]: 1, 2, 3, 4, 5, 7, 9


[Q]: ['449', '427', 'g', '397', '439', 'f', 'b', 'z', 't', 'f', 's', '379', 'o']
[A]: 2, 3, 4, 7, 9


[Q]: ['439', '277', '19', '463', 'w', 'n', '155', 'q', 'n']
[A]:
1, 2, 3, 4, 5, 6, 7, 9