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

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

PROBLEM: ['e', '307', '191', 'k', 'o', 'j', '99']

SOLUTION: 0, 1, 3, 7, 9

PROBLEM: ['s', 'm', '63', '157']

SOLUTION:
1, 3, 5, 6, 7