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: ['y', 'b']

SOLUTION: -1

PROBLEM: ['h', '475', 'x', '53', '461', 'c']

SOLUTION: 1, 3, 4, 5, 6, 7

PROBLEM: ['213', 't', '299', '155', 't', '419', '357', 'j', '111']

SOLUTION:
1, 2, 3, 4, 5, 7, 9