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', '195', 'u', '55']

SOLUTION: 1, 5, 9

PROBLEM: ['265', '251', '241', 'd', 'a', '59', '21', '385', '41', 'l', 'o', '205']

SOLUTION: 0, 1, 2, 3, 4, 5, 6, 8, 9

PROBLEM: ['w', '13', 'b', '455', 'b', 'k']

SOLUTION:
1, 3, 4, 5