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: ['a', '55', 's', '71', '271', '211']

Answer: 1, 2, 5, 7


Question: ['143', 'i', '499', 't', '27']

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


Question: ['275', 'u', '433', 'n', '213', '219', '137', 'l', '465', 'u', 'k', 'x', '99']

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