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: ['y', 'M', 'X', '6399', '8383', '4459']

SOLUTION: 25, 13, 24, 6399, 8383, 4459

PROBLEM: ['R', '5811', '8603', '8417', 'z', 'F', '3247', 'E', '1411', '6897', 'K', 'V', '7271', '1243', '5747', 'y', '5453']

SOLUTION: 18, 5811, 8603, 8417, 26, 6, 3247, 5, 1411, 6897, 11, 22, 7271, 1243, 5747, 25, 5453

PROBLEM: ['Q', '933', 'C', 'L', '9329', 'G', 'l', 'l', 'B', 'q', 'k', '717', 'd', '1221', 'N', 'p', '7611', 'U', 'y', 'p', '2369', 'm', '4191', 'j', '9777', '4699', 'O', '4941', '9497', 'Z', 'N', '6547', '3153', 'J', 'G', 'P', '4049', '6481', '1169']

SOLUTION:
17, 933, 3, 12, 9329, 7, 12, 12, 2, 17, 11, 717, 4, 1221, 14, 16, 7611, 21, 25, 16, 2369, 13, 4191, 10, 9777, 4699, 15, 4941, 9497, 26, 14, 6547, 3153, 10, 7, 16, 4049, 6481, 1169