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: ['229', 'x', '49', 'p', '73', '77', '337', '497']

SOLUTION: 2, 3, 4, 7, 9

PROBLEM: ['j', '259', 'r', '363', '149', 's', 'p', 'l', '271', '93', '205', 's', 'r', 'v', 'z']

SOLUTION: 0, 1, 2, 3, 4, 5, 6, 7, 9

PROBLEM: ['x', '169', 'w', '297', 'u', 'd', 'k', 'b', '461', '377', 'o', '145']

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