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: ['y', '301', 'c', 'l', 'x', '257', 'l', '1', 'r', '127', 'f', '157', '91', '423']

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


Question: ['p', '305', 't', 'x', '497', '209', '151', '89', '53', '189', 'n', '129', 'c', '227', 'p']

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


Question: ['x', 'i', 'c', 'b', '489', 'j', '131', '267', 's', '309', 'o', '401']

Answer:
0, 1, 2, 3, 4, 6, 7, 8, 9