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: ['357', '269', '105', '315', 'c', '301', 'v', '441', '415', 't', 'a', 'o', 'u', '23', 'n']

Answer: 0, 1, 2, 3, 4, 5, 6, 7, 9


Question: ['65', '195', 'k', '231', 'v', '359', '339', 'h', '405', '359', 'j']

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


Question: ['k', '447', 'l', 's', 'h', 'k', 'n', 'f']

Answer:
4, 7