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: ['353', '195', '297', '175', 'u', 'p', 'r', 'l']

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


Question: ['433', '133', '255', 'h', '59', 'm', '315', '149', 't', 'y', 'n', '59', '493', '295']

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


Question: ['187', 'v', 'g', '39', '193', 'y', 'i', '285', 'n']

Answer:
1, 2, 3, 5, 7, 8, 9