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: ['233', '339', '319']

Answer: 1, 2, 3, 9


Question: ['m', '107']

Answer: 0, 1, 7


Question: ['31', '73', '229', 't']

Answer:
1, 2, 3, 7, 9