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]: ['87', '139', 'y', '129', '255', '227', '103', 'j']
[EX A]: 0, 1, 2, 3, 5, 7, 8, 9

[EX Q]: ['k', 'k', 'o', 'c', 'p', '301', 'o']
[EX A]: 0, 1, 3

[EX Q]: ['135', '143', '479', '47']
[EX A]:
1, 3, 4, 5, 7, 9