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: ['w', '203', 'd', '133', 'i', 'j', 'd', 'u', 'u', 's', 'f', 'f', '221', '341', '299']

SOLUTION: 0, 1, 2, 3, 4, 9

PROBLEM: ['93', 'h', 'd', 'z', '395', 'r', 'j', 'f', '323', '215', 'n', 's', '497']

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

PROBLEM: ['t', 's', '391', 'k', 'g', '383', '483', '415', 'c', '477']

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