Teacher: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.
Teacher: Now, understand the problem? Solve this instance: ['j', '215', 'n', 'm', 'c', 'x', '293', '345', '213', '59', '315', '51', 'q', 'f']
Student:
1, 2, 3, 4, 5, 9