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: ['7', 'x', '365', 't', 'l', '253', '219', '363', '165', 'a', 'g', '347', 'y', 'w', '63']

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

PROBLEM: ['255', 'u', 's', 'g', '445']

SOLUTION: 2, 4, 5

PROBLEM: ['259', 'b', '159', 'r', '457', '471', '459', '499', 'q']

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