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]: ['m', 'n', '481', 'a', '343', '19', 'l', 'l', '477', '71']
[EX A]: 1, 3, 4, 7, 8, 9

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

[EX Q]: ['y', '279', '45', 'q', '73', 'q', '89', 'n', 'y', 'r', 'm', '277']
[EX A]:
2, 3, 4, 5, 7, 8, 9