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

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

PROBLEM: ['z', 'g', '311', 'd', 's', 'w']

SOLUTION: 1, 3

PROBLEM: ['129', 'a', 'm', 'l', '413', '471', '379', '315']

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