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: ['219', 'v', '295', '291', 'n', 'a', '133', 'a', 'y', 'i', 'e', '235', '461']

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

PROBLEM: ['45', 'n', 'u', '199', 'y', 'w']

SOLUTION: 1, 4, 5, 9

PROBLEM: ['w', '121', 'a', '17', '269', 'q', 'q', 'j', 'a', '293', '125', 'e']

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