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: ['w', '203', 'd', '133', 'i', 'j', 'd', 'u', 'u', 's', 'f', 'f', '221', '341', '299']

SOLUTION: 0, 1, 2, 3, 4, 9

PROBLEM: ['j', 'k']

SOLUTION: -1

PROBLEM: ['27', 'j', 'y', 'x', 'd', '151']

SOLUTION:
1, 2, 5, 7

