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


[Q]: ['445', '449']
[A]: 4, 5, 9


[Q]: ['x', 'w', 'g', 't', 'u']
[A]:
-1