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: ['n', 'f', '355', 'e', '113', '131', '443', '275', '249', '487']

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

PROBLEM: ['k', '135', '297']

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

PROBLEM: ['265', 'm', 'd', 'r', '401', 'j', 'r', 'o', 'g', 'r']

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