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: ['349', '327', 'c', 'a', '493', 'a', 'm', '337', '397', '213', '203', '139']

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


Question: ['t', '361', 'o', 'j', '395', 'u', '211', 'a', 'i', 'i', '375', 'h', '451']

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


Question: ['m', '349', '47', 'n', 'f', '275', '431']

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