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: ['233', '37', '221', 'n', 'j', 'y', '381', '175']

Answer: 1, 2, 3, 5, 7, 8


Question: ['61', '255', 'u', '219', '197', 'i', '453', 'i', '267', '217', 'o', 'g']

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


Question: ['421', 'c']

Answer:
1, 2, 4