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: ['o', '235', '479', 'e', '199', 'c', '25', '59', 'g', '415', '201', '129', 'a', 'i', 'c']

SOLUTION: 0, 1, 2, 3, 4, 5, 7, 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: ['143', '127', 'v', '347', '5', '101', 'p', 'x', '453', '417', '491', '205', 'i', '409', 'o']

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