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: ['71', '7', '341', '199', 'z', 'x', '201']

SOLUTION: 0, 1, 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: ['n', 'e', '451', '443', 'n', '267', 'q', 'a', '443', '295']

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