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: ['5', 'y', 'l', '311', '269', 'f', 'm', '25', 'j', 's', 't', '283', 'p']

Answer: 1, 2, 3, 5, 6, 8, 9


Question: ['m', 'f', '431', 'c']

Answer:
1, 3, 4