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: ['157', 'k', 'o', 'a', '279', 'g']

Answer: 1, 2, 5, 7, 9


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: ['241', '11', 'p', 'd', 'r', 'p', '235', '367', 'n', 'd']

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