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: ['445', '91', '141', '185', 'b', 'k', 'f', 'l', 'i', '229', 't', 'v']

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

PROBLEM: ['219', 'v', '295', '291', 'n', 'a', '133', 'a', 'y', 'i', 'e', '235', '461']

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

PROBLEM: ['323', 'z', 's', '157', 'c', 'z', '323', '241', 'e', '177', 'd', '151']

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