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: ['u', 'm', 's', '101', '427', 'h', 'i', '463', 'j', '77', '465', 'r']

SOLUTION: 0, 1, 2, 3, 4, 5, 6, 7

PROBLEM: ['175', 'q', 'h', 'z', 'v', 'y', '39', '419', '87', '425', 'z', '375']

SOLUTION: 1, 2, 3, 4, 5, 7, 8, 9

PROBLEM: ['75', 'w', 'w', 'l', 'q', '209', 'j', 'r', 'y']

SOLUTION:
0, 2, 5, 7, 9