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: ['411', 'n']

SOLUTION: 1, 4

PROBLEM: ['429', 'a', 'g', '7', 'j', 'd', 'y', '113']

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

PROBLEM: ['a', '459', 'c']

SOLUTION:
4, 5, 9

