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: ['235', '17', 'g', '125', '455', 'h', 'u', 'u', 'y', '219', '129', 'q', 'u', 'r']

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


Question: ['y', '101', 'g', 'c', 'z']

Answer: 0, 1


Question: ['r', '291']

Answer:
1, 2, 9