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: ['355', 'h', '287', 's', 'o', '497', '219']

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


Question: ['247', 's', 'y', 'c', '421']

Answer: 1, 2, 4, 7


Question: ['z', '391', '235', 'j', '51', 't', '471']

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