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: ['45', '95', 'y', '363', '265', '307', '309', '423']

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

PROBLEM: ['a', '441', '227', 'j', '13', '277', 'f', 'o']

SOLUTION: 1, 2, 3, 4, 7

PROBLEM: ['q', '167', 'n', 'u', '39', 'e', 'z', 'h', 'n']

SOLUTION:
1, 3, 6, 7, 9