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: ['239', 's', 'h', 'w', '131', 'i', 'x']

SOLUTION: 1, 2, 3, 9

PROBLEM: ['87', '353', '329', '163', 'i', 'd', '287']

SOLUTION: 1, 2, 3, 5, 6, 7, 8, 9

PROBLEM: ['w', '153']

SOLUTION:
1, 3, 5