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]: ['411', '367']
[EX A]: 1, 3, 4, 6, 7

[EX Q]: ['453', 'x', '355', '321', '451', 'i', 'j', 't', '427', 'y', '471', 'c', 'g', 'f', '61']
[EX A]:
1, 2, 3, 4, 5, 6, 7