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: ['u', 'm', 's', '101', '427', 'h', 'i', '463', 'j', '77', '465', 'r']

Answer: 0, 1, 2, 3, 4, 5, 6, 7


Question: ['f', 'f', '149', '311', '331', 'l', 'u', '349', 'v', 'v', '417', '285']

Answer: 1, 2, 3, 4, 5, 7, 8, 9


Question: ['v', '285', 'w', 'h', '421', 'l', 'v', 'f', '7', '17', '319', 'n', '421']

Answer:
1, 2, 3, 4, 5, 7, 8, 9