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: ['149', '129', 'k']

Answer: 1, 2, 4, 9


Question: ['y', 'v', '311', 'f', '273']

Answer: 1, 2, 3, 7


Question: ['c', '25', 'v', 'f', 'q', '21', '307', '151', '407', '443', 'v', 'i', '307', '345', 'a']

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