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: ['g', 'j', '239', 'w', 'q', 'm', 'a', 'l', 'n', 'p', 'i', 'r']

SOLUTION: 2, 3, 9

PROBLEM: ['151', 'j', 'o', 's', 'q', 'r', '325']

SOLUTION: 1, 2, 3, 5

PROBLEM: ['245', 'w', 'q', '381', '465', 'j', 'q', 'z', 'k']

SOLUTION:
1, 2, 3, 4, 5, 6, 8