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: ['d', '395', 'd', '233', '271']

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

PROBLEM: ['y', 'l', 'g', 'w', '13', 'd', '123', '279', '293', 'n', '341', 'n', '359', '35', 'd']

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

PROBLEM: ['q', '347', 'p', 'f', '487']

SOLUTION:
3, 4, 7, 8