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: ['j', 'a', '29', 'y', 's', '107', '149', '499', '37', 'o', '289', 't']

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

PROBLEM: ['d', '351', '357', 'q', 'b', '19', 'r', '231', '381', 'x', 'a', 'y', '263']

SOLUTION: 1, 2, 3, 5, 6, 7, 8, 9

PROBLEM: ['3', '347', '273', '279', 'h', '79', 'e', 'q', 'e', 'k', '25', '233', 'g']

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