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: ['449', '427', 'g', '397', '439', 'f', 'b', 'z', 't', 'f', 's', '379', 'o']

SOLUTION: 2, 3, 4, 7, 9

PROBLEM: ['q', 'a', '149']

SOLUTION: 1, 4, 9

PROBLEM: ['263', '303', 'x', '95', '9', '331', '205', 'm', 'w', '369', 'p', '183']

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