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: ['265', 'x', '109', '319', 's', 'w', '211']

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


Question: ['371', '459', '9', 'j', '425', 'k', '495', 'x', '105', '49', 'j', '101', 's']

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


Question: ['c', 'b', 'y', 'o', 'a', 'm', 'z', '271']

Answer:
1, 2, 7