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', 'c', '381', '149', '67', '67', '197', 'i', '289', '491', 'c', 'b']

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

PROBLEM: ['87', '139', 'y', '129', '255', '227', '103', 'j']

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

PROBLEM: ['125', 'm', 'u', 's', 'm', '231', 'l', '263', 'i', '143', 'w']

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