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: ['t', '175', '163', 'k', '279', '385', 'y', '71', 'g']

1, 2, 3, 5, 6, 7, 8, 9