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: ['u', '465', '129', 'o']

SOLUTION: 1, 2, 4, 5, 6, 9

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

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

PROBLEM: ['m', 'e', 'p']

SOLUTION:
-1