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: ['v', 'p', '113', '241', 's', 'q', 'b', '293', 'l', 'w', 'w', '127']

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

PROBLEM: ['291', '445', 'q', 't']

SOLUTION: 1, 2, 4, 5, 9

PROBLEM: ['j', 'd', '445', 'g', '263', '217', '357', 'c', '57', 'x']

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