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: ['43', '479', '317', 'w', '475', '255', '3', 'x']

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

PROBLEM: ['419', 'v', 'f', '325', '287', '153', 'g', 'o', '29', '463', 'e', '275']

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

PROBLEM: ['h', 'k', '117', 'u', 'h', '345', 'e', '97', 't', 'g', 'j']

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