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]: ['r', 'f', 'l', 'a', 'c', '489', 'e', 'p', 'm', '175', 'l']
[EX A]: 1, 4, 5, 7, 8, 9

[EX Q]: ['p', 't', '211', 'r', '439', 'h', 'g', 'c', '299', '371']
[EX A]: 1, 2, 3, 4, 7, 9

[EX Q]: ['357', '301', '483', '21', 'p', '27', 't']
[EX A]:
0, 1, 2, 3, 4, 5, 7, 8