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: ['97', '147', 'j', 'm', 'c', '445']

SOLUTION: 1, 4, 5, 7, 9

PROBLEM: ['u', '341', '151', '1', '157', '211', '189']

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

PROBLEM: ['y', 'o', 'o', 'h', '349']

SOLUTION:
3, 4, 9