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]: ['o', 'f', 'x', '239']
[EX A]: 2, 3, 9

[EX Q]: ['279', 'm', '453', 's', 'x', 'g', 'i', 'x', 'd']
[EX A]: 2, 3, 4, 5, 7, 9

[EX Q]: ['f', '149', 'b', '271', '451', '241', '45', '39', 'c', 'd', '271', 'y', '237']
[EX A]:
1, 2, 3, 4, 5, 7, 9