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: ['x', '493', 'x', '211', 'n', '143', '277', '191']

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


Question: ['c', '471', 'l', 'z', '23', 'c', '43', 'o', '175', 'w', 'c', 'p', '431']

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


Question: ['y', '119', '493', 'q', 'e', '231', '291', '77', 'i']

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