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: ['39', '461', '163', '379', '331', '137', 'g', 'm']

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


Question: ['493', '441', '3', 'p', '23', 'x', 'n', '417', '299', 'v', 'l', '415']

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


Question: ['a', 'd']

Answer:
-1