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: ['z', 'g', '311', 'd', 's', 'w']

Answer: 1, 3


Question: ['41', 'o', 'm', 'h', 's', 't', '407', '445', '371', '93', '291', '457', 'r', '391', 'a']

Answer: 0, 1, 2, 3, 4, 5, 7, 9


Question: ['g', '217', 'c', 'l']

Answer:
1, 2, 7