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: ['7', 'q', '201', 'p', '369', 'a', 'g', '429', 'i', 'g', '329', '295', '203']

Answer: 0, 1, 2, 3, 4, 5, 6, 7, 9


Question: ['255', 'u', 's', 'g', '445']

Answer: 2, 4, 5


Question: ['491', 'i', '255', 't', '247', 'i']

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