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: ['6605', 'J', 'F', '3771', '3491', 'M', '4207', 'x', '593', 'l', '8979', 'm', '4301', '3469', '6343', 'A', '1753', '9421', 'D', '4515', 'j', 'f', '5467', '9593', '7757', '5035', 'x', 'l', '8549', 's', '2899', '9059', 'G']

6605, 10, 6, 3771, 3491, 13, 4207, 24, 593, 12, 8979, 13, 4301, 3469, 6343, 1, 1753, 9421, 4, 4515, 10, 6, 5467, 9593, 7757, 5035, 24, 12, 8549, 19, 2899, 9059, 7