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: ['167', '229', '439', '389', '483', '207']

SOLUTION: 0, 1, 2, 3, 4, 6, 7, 8, 9

PROBLEM: ['j', '379', 'x', '51', 'k', 'r', 'i', '233', '363', '69', 'v', 'q', '151']

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

PROBLEM: ['r', 'x', 'm']

SOLUTION:
-1