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

[EX Q]: ['345', 'k']
[EX A]: 3, 4, 5

[EX Q]: ['383', '499', '393', '463']
[EX A]:
3, 4, 6, 8, 9