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: ['445', '91', '141', '185', 'b', 'k', 'f', 'l', 'i', '229', 't', 'v']

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

PROBLEM: ['353', 'k', 'j', '1', '375', 'e', 'd']

SOLUTION: 1, 3, 5, 7

PROBLEM: ['s', 'n', 'i']

SOLUTION:
-1