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: ['n', 'q', 'z', 'r', '41', '345', '115', '487', '273', 'q', '219', 'i', '23']

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

PROBLEM: ['477', 'a', 'n', 'r', '457', 'g', 'c']

SOLUTION: 4, 5, 7

PROBLEM: ['13', 'p', '427', 's', 'x', 'x', '43', 'h', 'j', 'z', '21']

SOLUTION:
1, 2, 3, 4, 7