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: ['217', '481', '87', 'w', 'q', 'c', 'j', '275', 'e', '49', '87', '25']

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

PROBLEM: ['y', '449', 'g', '345', '167', 'q', 'k']

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

PROBLEM: ['443', '293', '67', 'v', '463', '365', 'l', 'w', 'l', 'c', '459', '23', '493', 'o']

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