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: ['v', '467', 'm', '23', '479', '49', 'k', 'u', 'l', '119']

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

PROBLEM: ['b', '343', '149', 'h', 'w', 'j', 'd', 'r', '461', 'q', '265', '329', '499', 'r', '291']

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

PROBLEM: ['s', 'd', '167', '289', '27', 'n']

SOLUTION:
1, 2, 6, 7, 8, 9