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: ['475', 's', '123', '389', 'y', 'm', 'v', '47', 'u', '479', '357', '279', '137', 'l', 'i']

Answer: 1, 2, 3, 4, 5, 7, 8, 9


Question: ['439', '443', '175', 'e', 'm', '361', 'd']

Answer: 1, 3, 4, 5, 6, 7, 9


Question: ['33', '245', 'f', '105', 'h', '197', 'd', '421', '457', '215', '199']

Answer:
0, 1, 2, 3, 4, 5, 7, 9