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: ['j', 't', '143', '249', '457', 'i', '497', '471', 'l', 'x', '277']

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