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: ['239', '439']

SOLUTION: 2, 3, 4, 9

PROBLEM: ['271', '9', 'v', '93', 'f', 'd']

SOLUTION: 1, 2, 3, 7, 9

PROBLEM: ['h', 'l', '371', '427', 'j', 'e', '271', '11', 'b', '207', '341', '223', '165', '199', '485']

SOLUTION:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9