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: ['343', '471', 'z', 'e', 'z', '351']

SOLUTION: 1, 3, 4, 5, 7

PROBLEM: ['e', 's', '271', 'k', 'e', 'y', '89']

SOLUTION: 1, 2, 7, 8, 9

PROBLEM: ['491', '75', '275', 'j', 'g', 'x', '99', 'f', '135', 'o', 'd', 'a', '1']

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