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: ['483', '409', '129', 'u', '167', '275', 'p', '163', 'r', 'q', 'i', '481', 'j', '271']

SOLUTION: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

PROBLEM: ['187', '461', 'b']

SOLUTION: 1, 4, 6, 7, 8

PROBLEM: ['101', 'l', 'k', 'n', '359', '353', 'w', 't', 'q', 'q', 's', 'f', 'g', '323']

SOLUTION:
0, 1, 2, 3, 5, 9