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', 'y', '133', 'c', '415', 'p']

SOLUTION: 1, 3, 4, 5

PROBLEM: ['353', '231', 'w', 't', 'j', 'r', 'm', '455', 'i', '281', '215']

SOLUTION: 1, 2, 3, 4, 5, 8

PROBLEM: ['a', 'r', 'w', 'a', 'n', '489', 'p', 'y', '1', 'w', '165']

SOLUTION:
1, 4, 5, 6, 8, 9