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: ['k', '217']

Answer: 1, 2, 7


Question: ['411', '367']

Answer: 1, 3, 4, 6, 7


Question: ['t', 'f', 'g', '147', '133', 'o', 'f', 'z', 'g', 'e']

Answer:
1, 3, 4, 7