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: ['j', 'k']

SOLUTION: -1

PROBLEM: ['z', 'l', 's', '249', 'e', 'h', 'l']

SOLUTION: 2, 4, 9

PROBLEM: ['q', 'g', 'i', 'y']

SOLUTION:
-1