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: ['k', '409', '333', '283', 'm', '489', '377', '439', '443', 'r', '101', 'n', '35']

SOLUTION: 0, 1, 2, 3, 4, 5, 7, 8, 9

PROBLEM: ['353', 'k', 'j', '1', '375', 'e', 'd']

SOLUTION: 1, 3, 5, 7

PROBLEM: ['s', '189', '499', 'j', 'c', '7', 'o', '213', '155', '495', 'v', 'k', 'y']

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