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

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


Question: ['345', 'k']

Answer: 3, 4, 5


Question: ['421', '409', 'o', 'f', 'l', 'u', '421', 'l', 'm', 'i', '271']

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