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: ['j', 't']

SOLUTION: -1

PROBLEM: ['q', '403', '293', '245', '303', '145', 'u', '385', 'c', 'p', 'r', 'y', '53']

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

PROBLEM: ['g', '413', '187', 'r', 'b', '475', 'g', 'b', '289', 'a', '15', '215', '169']

SOLUTION:
1, 2, 3, 4, 5, 6, 7, 8, 9