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', 'u', 'e', 'a', '369', 'e', 'r', 'm']

Answer: 3, 6, 9


Question: ['j', '463', 'z', '35', 'w', '191', '333', 'a']

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


Question: ['477', '293', '301', '269', '149', 'm']

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