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: ['387', '7', '93', '105', '181']

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

PROBLEM: ['73', '215', '389', '381', 'e', 'v', 'j', 'l', 'r']

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

PROBLEM: ['259', 'g', '71', '203', '51', '329', '473', 'e', '453', 't', 'w', '303', 's', '83', 'w']

SOLUTION:
0, 1, 2, 3, 4, 5, 7, 8, 9