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]: ['445', '449']
[EX A]: 4, 5, 9

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

[EX Q]: ['m', '93', '445', '487', 'l', 'm', 'w', '75', 'x', 'p', '245', 'b']
[EX A]:
2, 3, 4, 5, 7, 8, 9