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: ['219', '127', '449', 'u', 'g']

SOLUTION: 1, 2, 4, 7, 9

PROBLEM: ['s', 'y', '133', 'c', '415', 'p']

SOLUTION: 1, 3, 4, 5

PROBLEM: ['j', 'j']

SOLUTION:
-1