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]: ['141', 'm', '139', '197', '321', '265', 'p']
[EX A]: 1, 2, 3, 4, 5, 6, 7, 9

[EX Q]: ['149', 'o', '237', 't', 'k', 'w']
[EX A]: 1, 2, 3, 4, 7, 9

[EX Q]: ['t', 'g', '261', '67', '171', 'i', 'x', '3', 'a', 'k', '173', '99', 'i', 'o']
[EX A]:
1, 2, 3, 6, 7, 9