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: ['403', 'j', 'x', '187', '311', 'g', 'z', 'p', '287', 'w', 'k', 'm']

Answer: 0, 1, 2, 3, 4, 7, 8


Question: ['n', 'f', '355', 'e', '113', '131', '443', '275', '249', '487']

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


Question: ['b', '377', 'o', '231']

Answer:
1, 2, 3, 7