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: ['461', 'u', 't']

Answer: 1, 4, 6


Question: ['359', '233', '455', '449', 'h']

Answer: 2, 3, 4, 5, 9


Question: ['p', '49', 'a', 'k', 'g', 'z', 'e', 'g', '169', '475', '249', '279', '281', '385', 'y']

Answer:
1, 2, 3, 4, 5, 6, 7, 8, 9