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: ['305', '447', '125', 'c', '469', '231', 'c', '33', 'r', '69', 'p', 'b', '143']

Answer: 0, 1, 2, 3, 4, 5, 6, 7, 9


Question: ['197', 'q']

Answer: 1, 7, 9


Question: ['g', 'v', 'i', 'd', 'm', 'd', 'e', 'u', '469', 'z']

Answer:
4, 6, 9