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: ['445', '91', '141', '185', 'b', 'k', 'f', 'l', 'i', '229', 't', 'v']

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

PROBLEM: ['483', 'e', '57', 'a', '101', 'f', 'z', 'q', '115', 'x', '3', '305', '435', '45']

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

PROBLEM: ['403', '323', 'h', '27', '371', 'y', 'a', 'f', '419']

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