Definition: 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.
Input: ['9', '475', '429', '63', '153', '473', 'b', 'c', '375', '399', '159', 'g']

1, 2, 3, 4, 5, 6, 7, 9