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

Answer: 2, 4, 5


Question: ['i', '127', 'j', 'z', '489', '359', 'i', 'j', 'y', 'p', 'm', 'z']

Answer: 1, 2, 3, 4, 5, 7, 8, 9


Question: ['393', 'j', 'b']

Answer:
3, 9