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: ['u', '207', 'q', '371', 's', '51', '217', 'q', '255', '9', '109', 'l', 'b', 'w']

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


Question: ['j', 'k']

Answer: -1


Question: ['267', 'l', 'b', '181']

Answer:
1, 2, 6, 7, 8