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: ['f', '135', 's', '269', 'x', '45', 'p', '141', 'e']

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

PROBLEM: ['293', '473', '79', 'j', '455', '285', 'k', 'd', '379', '249', '73', '229']

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

PROBLEM: ['11', 'i', '449', 'g', '393', 'd', '135', '295', 't']

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