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.
--------
Question: ['b', '351', 'g', 'k', '29', '15', '411', '97', 'r', '27', '279']

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


Question: ['411', 'i', '107', '75', 'b', 'l', 't', '351', '413', 'l', '363']

Answer: 0, 1, 3, 4, 5, 6, 7


Question: ['491', '231', 'l', '287', 's', 'o', 'i', 'i', 'f', 'p', 's', 'h', 'o', '439', '253']

Answer:
1, 2, 3, 4, 5, 7, 8, 9