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: ['733', '5303', 'S', 's', '2599', '3641', 'U', 'y', '4417', 'u', 'X', 'e', 'd', 'V', '2221', '5615', '8385', '2005', 'K', 'S', 'r', '8571', '5767', '1029', '1033', 'i', 'N', 'E', '7503', '1505', '6095', '8261', 'i', 'J', '6069']

733, 5303, 19, 19, 2599, 3641, 21, 25, 4417, 21, 24, 5, 4, 22, 2221, 5615, 8385, 2005, 11, 19, 18, 8571, 5767, 1029, 1033, 9, 14, 5, 7503, 1505, 6095, 8261, 9, 10, 6069