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: ['415', '365', '373', 't', 'n']

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


Question: ['v', '467', 'm', '23', '479', '49', 'k', 'u', 'l', '119']

Answer: 1, 2, 3, 4, 6, 7, 9


Question: ['a', 't']

Answer:
-1