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: ['255', 'u', 's', 'g', '445']

SOLUTION: 2, 4, 5

PROBLEM: ['233', '35', 'l', 'j', '89', 'r', 't']

SOLUTION: 2, 3, 5, 8, 9

PROBLEM: ['k', 'p', '289', 'q', 'e', '5', '65', '401', '319']

SOLUTION:
0, 1, 2, 3, 4, 5, 6, 8, 9