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: ['121', 'm', 'n', '143', '281', 'c', 'j']

Answer: 1, 2, 3, 4, 8


Question: ['u', '157', '63', '411', 'x', 'c', 'k', 'z', 'i', '279', '311', '431']

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


Question: ['f', 'g']

Answer:
-1