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]: ['487', 'x']
[EX A]: 4, 7, 8

[EX Q]: ['45', 'n', 'u', '199', 'y', 'w']
[EX A]: 1, 4, 5, 9

[EX Q]: ['s', '139']
[EX A]:
1, 3, 9