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]: ['437', '377']
[A]: 3, 4, 7


[Q]: ['43', 'd']
[A]: 3, 4


[Q]: ['215', '221', 'd', 't', '217']
[A]:
1, 2, 5, 7