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', '355', 'w', 'f', 'b', '183', '327', '277']

SOLUTION: 1, 2, 3, 5, 7, 8

PROBLEM: ['a', 'n', '423', 'y', 'y', 'u', '55', 'y', '295', '73', 't', 'p']

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

PROBLEM: ['g', '5', 'f', '17', 'a', 'n', 'x', '465', 'i', '427', '15', '173']

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