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: ['i', 'z', '131', '449', '141', 's']

SOLUTION: 1, 3, 4, 9

PROBLEM: ['217', '481', '87', 'w', 'q', 'c', 'j', '275', 'e', '49', '87', '25']

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

PROBLEM: ['x', 'e', '27', '221', 'p', '389', 't', '387', '145', 'n', '239', 'q']

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