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: ['x', '281', 'n', '385', '435', 'l', 's', '445', 'n', 'n', '133']

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


Question: ['375', '457', '423', 'q', 't']

Answer: 2, 3, 4, 5, 7


Question: ['p', 'y']

Answer:
-1