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: ['233', '37', '221', 'n', 'j', 'y', '381', '175']

SOLUTION: 1, 2, 3, 5, 7, 8

PROBLEM: ['475', 'd', '467', 'h', 'r', 'r', '139', '307', '141', 'f']

SOLUTION: 0, 1, 3, 4, 5, 6, 7, 9

PROBLEM: ['203', '483', 'h', '273', 'o', '137']

SOLUTION:
0, 1, 2, 3, 4, 7, 8