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: ['379', '485', '415', '37', '221', '125', '245', '87', 'a']

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


Question: ['s', '443', '239', 't', '99']

Answer: 2, 3, 4, 9


Question: ['287', '61', '301', 'e', 'o', 'x', '105', 'o', 'm', '173', '341', 'r', 'm', '221']

Answer:
0, 1, 2, 3, 4, 5, 6, 7, 8