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: ['h', 'o', 's', '335', '317', '279', '217', '485']

SOLUTION: 1, 2, 3, 4, 5, 7, 8, 9

PROBLEM: ['p', '231', 'd', 'i', '33', '431']

SOLUTION: 1, 2, 3, 4

PROBLEM: ['y', 'w', '259']

SOLUTION:
2, 5, 9