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', 'r', '139', 'h', '343', 'f', '79', 'a', 'r', 'i', 't']

1, 3, 4, 7, 9