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: ['q', 'u', '199', 'v', '249']

SOLUTION: 1, 2, 4, 9

PROBLEM: ['367', 'j', 'p', '177', 'w', '367', '495', 'g', '253', '211', '385']

SOLUTION: 1, 2, 3, 4, 5, 6, 7, 8, 9

PROBLEM: ['z', 'x', 'c', 't', '129', 'm', 'o', '315', '181', '349', 'k', 'r', 'x', 'm']

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