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: ['151', 'j', 'o', 's', 'q', 'r', '325']

SOLUTION: 1, 2, 3, 5

PROBLEM: ['469', 'y', 'j', 'u', '475', 'k', 'k']

SOLUTION: 4, 5, 6, 7, 9

PROBLEM: ['449', '113']

SOLUTION:
1, 3, 4, 9