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: ['381', '357', 'w', 'r', '115', 'z', '389', 'p', 'p', '101', '229']

SOLUTION: 0, 1, 2, 3, 5, 7, 8, 9

PROBLEM: ['255', 'u', 's', 'g', '445']

SOLUTION: 2, 4, 5

PROBLEM: ['v', '177', 'o', 's', 'b', 'e', 'p', 'v', '413']

SOLUTION:
1, 3, 4, 7