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: ['u', '157', '63', '411', 'x', 'c', 'k', 'z', 'i', '279', '311', '431']

Answer: 1, 2, 3, 4, 5, 6, 7, 9


Question: ['71', '7', '341', '199', 'z', 'x', '201']

Answer: 0, 1, 2, 3, 4, 7, 9


Question: ['i', 'g', '147', 'g', 'x', '227', '399', 'b', '269', '295', '157', 'j', 'c']

Answer:
1, 2, 3, 4, 5, 6, 7, 9