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.
Input: ['5917', '5311', '4193', '4563', '9833', '1557', '3305', '8959', '3757', 'w', '3023', '7501', 'Q', 'b', '903', '649', 'o', '6703', '4797', '6479', '2719', 'X', 'T', 'J', 'I', 'I', '5113', '3617', 'z', '5083', 'P', '9587']

5917, 5311, 4193, 4563, 9833, 1557, 3305, 8959, 3757, 23, 3023, 7501, 17, 2, 903, 649, 15, 6703, 4797, 6479, 2719, 24, 20, 10, 9, 9, 5113, 3617, 26, 5083, 16, 9587