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]: ['t', 'v', '469', 'n']
[A]: 4, 6, 9


[Q]: ['h', 'd', 'y', '153', '205', '135', '177', '221', '237', 'x', 'c']
[A]:
0, 1, 2, 3, 5, 7