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', '233', 'h', 'd', 's', '83', '149', 'p', 'm']

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

PROBLEM: ['247', 's', 'y', 'c', '421']

SOLUTION: 1, 2, 4, 7

PROBLEM: ['w', 'p', 'r', 'v', 'd']

SOLUTION:
-1