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: ['t', '493', 's', 'f', '279', 'f']

Answer: 2, 3, 4, 7, 9


Question: ['k', 'k', 'o', 'c', 'p', '301', 'o']

Answer: 0, 1, 3


Question: ['245', 'a', 'w', '209', 'r', 'i', '409', 'n']

Answer:
0, 2, 4, 5, 9