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: ['345', 'h', '9']

SOLUTION: 3, 4, 5, 9

PROBLEM: ['69', '307', 'l', 'j', '167', 'o', '427', 'j']

SOLUTION: 0, 1, 2, 3, 4, 6, 7, 9

PROBLEM: ['o', 'y']

SOLUTION:
-1