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: ['s', 't', 'c', '299', 'g', '33', 'o', '485', '345', '295', 'm', '345', 'q', '431', '151']

SOLUTION: 1, 2, 3, 4, 5, 8, 9

PROBLEM: ['n', '319', 's', '325', '177', '161', '43', 'g', 'o', '59', 'w', 'y', 'g', 'm']

SOLUTION: 1, 2, 3, 4, 5, 6, 7, 9

PROBLEM: ['115', '423', 'e']

SOLUTION:
1, 2, 3, 4, 5