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]: ['159', 'y', '369', 'r', '341', '23', 's', '209', 'l', 's', '473']
[EX A]: 0, 1, 2, 3, 4, 5, 6, 7, 9

[EX Q]: ['z', '209']
[EX A]: 0, 2, 9

[EX Q]: ['171', 'a', 'h', 'w', 'a', 'k', 'f', 'f', '77', '457', 'l', 'r', '415']
[EX A]:
1, 4, 5, 7