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]: ['u', 'z', 'p', '99', 'b']
[EX A]: 9

[EX Q]: ['t', '493', 's', 'f', '279', 'f']
[EX A]: 2, 3, 4, 7, 9

[EX Q]: ['x', '43', 'q', '411', 'f', '37', '281']
[EX A]:
1, 2, 3, 4, 7, 8