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.
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Question: ['t', '437', 'o', 'w', 'x', 'e', 'r', 'r', '149', 'd', '391']

Answer: 1, 3, 4, 7, 9


Question: ['151', 'j', 'o', 's', 'q', 'r', '325']

Answer: 1, 2, 3, 5


Question: ['141', '205', '61', '449', '463', '263', 'q', 'a', 'k', '293']

Answer:
0, 1, 2, 3, 4, 5, 6, 9