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: ['j', 't']

Answer: -1


Question: ['b', 'a', '409', 's', 'a', 'o', '135', 'v', '225', 'g', '3', '341']

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