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: ['i', 'f', 'g', '267', '113', '93', 'r', '401', 'g', 'e']

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


Question: ['m', 'n', '481', 'a', '343', '19', 'l', 'l', '477', '71']

Answer: 1, 3, 4, 7, 8, 9


Question: ['343', 'r', '155', 'k', '115', '431']

Answer:
1, 3, 4, 5