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: ['y', '301', 'c', 'l', 'x', '257', 'l', '1', 'r', '127', 'f', '157', '91', '423']

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


Question: ['397', 'x', 'e', '179', '105', '381']

Answer: 0, 1, 3, 5, 7, 8, 9


Question: ['r', '309', 'w', '317', 'd', 'm', 't', '197', 'm', '215', '123', 'd', 'f', 'y']

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