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: ['i', 'x', 'l', '443', '127', '31', '457', '177', 'w', 'g', 's', '487', 'i', 'w', '151']

1, 2, 3, 4, 5, 7, 8