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]: ['131', '483', 'k', '387', '451', 'j']
[EX A]: 1, 3, 4, 5, 7, 8

[EX Q]: ['u', '157', '63', '411', 'x', 'c', 'k', 'z', 'i', '279', '311', '431']
[EX A]: 1, 2, 3, 4, 5, 6, 7, 9

[EX Q]: ['p', 'k', '261', '109']
[EX A]:
0, 1, 2, 6, 9