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]: ['279', '115']
[EX A]: 1, 2, 5, 7, 9

[EX Q]: ['u', 'c', 'f', 'z', '51', '301', 'q', '275']
[EX A]: 0, 1, 2, 3, 5, 7

[EX Q]: ['p', '315', '139', '449', '237', '355', 't', 'w', '207']
[EX A]:
0, 1, 2, 3, 4, 5, 7, 9