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: ['73', '215', '389', '381', 'e', 'v', 'j', 'l', 'r']

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


Question: ['163', '375', 'e', 'g', '115', '445', 'c', '393', 'm', '59']

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


Question: ['g', 'v', 'i', 'r', '263', 'y', '491', 'z', 'j', '413', 'h', '143', 'z', '171', 'u']

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