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: ['4481', '3957', 'l', '257', 'Y', '6271', 'a', 'a', '9103', '5057', 'g', '8273', '1475', '3583', '3399', 'j', 'O', 'I', '2499', '8301', 'a', 'H', 'l', '903', 'n', '8951', 'U', 'm', 'i', 'R', '6215', 'l', 'f', '407', 'F', '9303']

SOLUTION: 4481, 3957, 12, 257, 25, 6271, 1, 1, 9103, 5057, 7, 8273, 1475, 3583, 3399, 10, 15, 9, 2499, 8301, 1, 8, 12, 903, 14, 8951, 21, 13, 9, 18, 6215, 12, 6, 407, 6, 9303

PROBLEM: ['9381', 'f', '9595', 'U', '4857', '5865', '8259', 'Y', 'g']

SOLUTION: 9381, 6, 9595, 21, 4857, 5865, 8259, 25, 7

PROBLEM: ['3283', 'i', 'd', '4707', 'V', 'y', '7749', '9079', '8503', 'C', '2833', '5899', '9359', '3707', '4711', '2249', '6955', '917', 'c', 'P', 'V', 'K', '7655']

SOLUTION:
3283, 9, 4, 4707, 22, 25, 7749, 9079, 8503, 3, 2833, 5899, 9359, 3707, 4711, 2249, 6955, 917, 3, 16, 22, 11, 7655