TASK 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.
PROBLEM: ['119', '189', 'k', 'e', '425', '21', '245']

SOLUTION: 1, 2, 4, 5, 8, 9

PROBLEM: ['u', '73', 'x', 'f', 'e', '187', 'x', 'i', '215', '1', 'z', '129', '89', 'f', 'i']

SOLUTION: 1, 2, 3, 5, 7, 8, 9

PROBLEM: ['n', 'q', 'z', 'r', '41', '345', '115', '487', '273', 'q', '219', 'i', '23']

SOLUTION:
1, 2, 3, 4, 5, 7, 8, 9