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: ['s', 't', '189', 'j', 'r']

SOLUTION: 1, 8, 9

PROBLEM: ['227', '161', '389', 'g', 'g', 'i', 'm', '199', '487', '65', '341', '377', 'x', 'r']

SOLUTION: 1, 2, 3, 4, 5, 6, 7, 8, 9

PROBLEM: ['v', 't', '275', 'g', '433', 'k', '145', '485', '441', '167', 'p', '175', 'e', '119', '337']

SOLUTION:
1, 2, 3, 4, 5, 6, 7, 8, 9