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: ['h', 'l', '43', 'b', 'g', '265', '355', 'y']

Answer: 2, 3, 4, 5, 6


Question: ['23', 'p', '409', '305', 'z', 'q', '295', '391']

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


Question: ['n', '79']

Answer:
7, 9