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: ['b', '351', 'g', 'k', '29', '15', '411', '97', 'r', '27', '279']

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


Question: ['y', 'o', '287', 'm', 's', '61']

Answer: 1, 2, 6, 7, 8


Question: ['305', '137', 'z', 'n', 'm', '53', '85', '425', 'r', '323', '381', '159', '391']

Answer:
0, 1, 2, 3, 4, 5, 7, 8, 9