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: ['455', '447', 'x', '479', 'b', '267', '339', '29', '267']

Answer: 2, 3, 4, 5, 6, 7, 9


Question: ['431', '245', '23', 'c', '185', 'k', '155', '163', 'e', '35', 'r', '175', '163']

Answer: 1, 2, 3, 4, 5, 6, 7, 8


Question: ['y', 'l', 'k', 'x', 'l', 'g', '123']

Answer:
1, 2, 3