TASK DEFINITION: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
PROBLEM: ['5913', '6135', '4167', 'S', '9777', 'S']

SOLUTION: 5913, 6135, 4167, 19, 9777, 19

PROBLEM: ['z', 'p', '5297', '2177', 'a', 'K', '6217', 'P', 'i', '3365', '5083', 'M', '9027', '6689', 'H', 'Z', '3199', '8879', 'D', '9265', '1803', '5129', '9369', '8119', '7349', '1283', '5777', '6649', '7189']

SOLUTION: 26, 16, 5297, 2177, 1, 11, 6217, 16, 9, 3365, 5083, 13, 9027, 6689, 8, 26, 3199, 8879, 4, 9265, 1803, 5129, 9369, 8119, 7349, 1283, 5777, 6649, 7189

PROBLEM: ['8739', 'l', '2407']

SOLUTION:
8739, 12, 2407