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: ['487', '355', 'm', 's', '367', 'n', '203', 'x', 't', 'v', 'd', '251']

Answer: 0, 1, 2, 3, 4, 5, 6, 7, 8


Question: ['151', 'j', 'o', 's', 'q', 'r', '325']

Answer: 1, 2, 3, 5


Question: ['y', '115', '1', '17', 'r', '297', '255']

Answer:
1, 2, 5, 7, 9