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: ['149', 'o', '237', 't', 'k', 'w']

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


Question: ['s', '95', 'j', '173', '437', '143', 'n', '357', 'w', '239', '219']

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


Question: ['s', 'c', 'u', 's', 'j']

Answer:
-1