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: ['j', 'v', 'q', '393', 'z', 'l', 'g', 'q', '193']

SOLUTION: 1, 3, 9

PROBLEM: ['131', 'x', '167', '341']

SOLUTION:
1, 3, 4, 6, 7