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: ['7', 'u', 's', '75', 't', 'o']

SOLUTION: 5, 7

PROBLEM: ['p', '449', 's', 'u', '95', 'g', 'x']

SOLUTION:
4, 5, 9

