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]: ['k', '135', '297']
[EX A]: 1, 2, 3, 5, 7, 9

[EX Q]: ['h', '475', 'x', '53', '461', 'c']
[EX A]: 1, 3, 4, 5, 6, 7

[EX Q]: ['203', '397', 'd', '15', 'g', '157']
[EX A]:
0, 1, 2, 3, 5, 7, 9