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: ['7', 'q', '201', 'p', '369', 'a', 'g', '429', 'i', 'g', '329', '295', '203']

SOLUTION: 0, 1, 2, 3, 4, 5, 6, 7, 9

PROBLEM: ['c', '471', 'l', 'z', '23', 'c', '43', 'o', '175', 'w', 'c', 'p', '431']

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

PROBLEM: ['427', '499', 'a', 'v', '121', 'r']

SOLUTION:
1, 2, 4, 7, 9