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: ['461', 'u', 't']

Answer: 1, 4, 6


Question: ['217', 'c', 'h', 'e', 't', '331', '69']

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


Question: ['35', 'h', 'u']

Answer:
3, 5