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: ['343', 'c', '7', '271', 'm', '151', 'd', 'n', '305', 'y', 'w', '255']

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

PROBLEM: ['h', '281', 'x', '471']

SOLUTION: 1, 2, 4, 7, 8

PROBLEM: ['383', 'd', 'h']

SOLUTION:
3, 8