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: ['x', '281', 'n', '385', '435', 'l', 's', '445', 'n', 'n', '133']

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

PROBLEM: ['233', '35', 'l', 'j', '89', 'r', 't']

SOLUTION: 2, 3, 5, 8, 9

PROBLEM: ['279', '405', '101', '483', '197', 'n']

SOLUTION:
0, 1, 2, 3, 4, 5, 7, 8, 9