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]: ['407', 'a', 'l', '307', 'a']
[EX A]: 0, 3, 4, 7

[EX Q]: ['e', 'o', 'c', 'j', 'g', '249', 's', 'b', 'f', '359', '107', 'i']
[EX A]: 0, 1, 2, 3, 4, 5, 7, 9

[EX Q]: ['e', 'b', '55', '287', 'z', 'x', 'x', 'r']
[EX A]:
2, 5, 7, 8