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: ['235', '17', 'g', '125', '455', 'h', 'u', 'u', 'y', '219', '129', 'q', 'u', 'r']

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

PROBLEM: ['v', '351', 's', 'f', 'd', '137', '11', '355', '345', 'm', 's', '165', '97', '225']

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

PROBLEM: ['c', 'v', 'o', '17', 'l', 'g', '265', '373', '67', 'w', 'y', '443', '65']

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