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: ['v', '477', 'j', '339', '245', 'r', '417', 'g', '475', 'n', 'q', '171']

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


Question: ['c', '435', 'c', 'q', 'u', '191', 'b', 'l', '217']

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


Question: ['h', 'a', '175', '445', 'g', 'n']

Answer:
1, 4, 5, 7