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: ['339', '473', '485']

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


Question: ['z', '273', '447', 'h']

Answer: 2, 3, 4, 7


Question: ['155', '167', 'w', '1', 'f', 'u', 'g', 'a', '395']

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