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: ['p', '239', 'i', '253', '351', '337', 'd', 'c', '427', 'b', 'i']

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