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: ['233', '37', '221', 'n', 'j', 'y', '381', '175']

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

PROBLEM: ['s', 'y', '133', 'c', '415', 'p']

SOLUTION: 1, 3, 4, 5

PROBLEM: ['317', '199', '267', '475', 's']

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