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

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