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: ['d', '395', 'd', '233', '271']

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

PROBLEM: ['j', '355', 'w', 'f', 'b', '183', '327', '277']

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

PROBLEM: ['51', 'f', '435', 'w', 'y', '309', 'e', 'l', '319', 'g', 'f']

SOLUTION:
0, 1, 3, 4, 5, 9