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: ['q', 'u']

Answer: -1


Question: ['r', '321', '355', 'w', 'm', 'v', 'a', 'u', '455', 'n', '169']

Answer: 1, 2, 3, 4, 5, 6, 9


Question: ['299', 'q', 't', 'z', 'p', '299']

Answer:
2, 9