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: ['j', 'w', 'h', 'r', 'w', 'h', 'd', 'f', '81', 'g', '145']

SOLUTION: 1, 4, 5, 8

PROBLEM: ['u', '73', 'x', 'f', 'e', '187', 'x', 'i', '215', '1', 'z', '129', '89', 'f', 'i']

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

PROBLEM: ['133', '193', 'y', '315', '327', 'd']

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