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: ['291', '473', '113', 'm', '273', '387', 'l', '273', 'r', 's', '449', 'r', '171', '279', 'e']
Output:
1, 2, 3, 4, 7, 8, 9