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: ['361', '47', 'k', '33']

SOLUTION: 1, 3, 4, 6, 7

PROBLEM: ['7', 'x', '365', 't', 'l', '253', '219', '363', '165', 'a', 'g', '347', 'y', 'w', '63']

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

PROBLEM: ['301', 'b', '453', '49', 'x', '185', '201', 'k', 'w', '289']

SOLUTION:
0, 1, 2, 3, 4, 5, 8, 9