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: ['221', '191', 'w', 'l', 'h', 'a']

SOLUTION: 1, 2, 9

PROBLEM: ['213', 'm', '347', '217', 'g', '207', '361', 'q']

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

PROBLEM: ['x', 'x', '359', 'd', '401', '13', 'g']

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