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: ['l', 'g', 'o', 'x', '27', 'r', '123', '395', 'p', '27', '213', '455', 'y', '97']

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


Question: ['n', 'm', 'u', '267']

Answer: 2, 6, 7


Question: ['j', '139', 'd', 'd', '345', '279', 'q', 'm', '73', 'q', '247', 'w', '235']

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