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', 'p', '379', 'v', '137', '179', 'c', 'm', 'p', 'r', '317', 'i']

1, 2, 3, 7, 9