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: ['W', '7533', '1447', '5111', '2125', 'F', 't', '1481', 'w', 'x', '6279', 'Y', '4167', 'P', 'y', '663', 'W', 'm', '3717', 'n']

SOLUTION: 23, 7533, 1447, 5111, 2125, 6, 20, 1481, 23, 24, 6279, 25, 4167, 16, 25, 663, 23, 13, 3717, 14

PROBLEM: ['2581', 'X', '3249', '753', '5639']

SOLUTION: 2581, 24, 3249, 753, 5639

PROBLEM: ['t', '1091', 'V', '893', '539', '8945', '59', '5865', 'K', '5265', '4521', 'o', '2307', 'G', '4105', '4137', 'j', 'L', 'L', 'K', '5885', '373', '6579', 'W', '3167', 's', 'v', 'A', '281', '8197', '1919', 'X', '7605']

SOLUTION:
20, 1091, 22, 893, 539, 8945, 59, 5865, 11, 5265, 4521, 15, 2307, 7, 4105, 4137, 10, 12, 12, 11, 5885, 373, 6579, 23, 3167, 19, 22, 1, 281, 8197, 1919, 24, 7605