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: ['l', 'g', 'o', 'x', '27', 'r', '123', '395', 'p', '27', '213', '455', 'y', '97']

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

PROBLEM: ['x', '325', 'i', 'n', 'i', 'w', 't']

SOLUTION: 2, 3, 5

PROBLEM: ['e', 'y', 'f', 'l', '359']

SOLUTION:
3, 5, 9