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: ['313', 'q', '355', 'y', 'b', '267', 'd', '253', '393', '409']

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

PROBLEM: ['475', 's', '123', '389', 'y', 'm', 'v', '47', 'u', '479', '357', '279', '137', 'l', 'i']

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

PROBLEM: ['r', '25', 'n', 'y', '307', 'b', 'p', 'p', 'y', '491', 'c']

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