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: ['9171', '6491', 'a', '8485', 'm', '1669', '7363', '1551', 'c', 'Q', 'e', '3357', '4721', '5167', '8799', 'S', '9487', 'R', '7467', 'v', '9767', 'f', '4641', 'W', '3295', 'E', 'w', '2889', '7529', '5239', '3265', 'Y', 'm', '983', 'Y', 'k', '9893', '601']

9171, 6491, 1, 8485, 13, 1669, 7363, 1551, 3, 17, 5, 3357, 4721, 5167, 8799, 19, 9487, 18, 7467, 22, 9767, 6, 4641, 23, 3295, 5, 23, 2889, 7529, 5239, 3265, 25, 13, 983, 25, 11, 9893, 601