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

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


Question: ['257', '111', 'g', '277', '473', '105', 'x', '217']

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


Question: ['t', '251', 'b', '241', 'z', '255']

Answer:
1, 2, 4, 5