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]: ['v', 'i', 'g', 'h']
[EX A]: -1

[EX Q]: ['g', '55', '153', '179', 'l', 'k', 'h', '21', '433', 'r', '53', '85', 'f', 'e']
[EX A]: 1, 2, 3, 4, 5, 7, 8, 9

[EX Q]: ['463', '381', '373', '375', '265', '145', '399', '21', 'x', '261']
[EX A]:
1, 2, 3, 4, 5, 6, 7, 8, 9