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: ['3733', '3713', '5613', 'A', 'l', '7887', '9227', 'c', 'U', '25', 'i', '327', 'y', 'C', 'R', 'n', '4565', '3199', 'F', '6183', '1861', '1451', '399', '2181', 'C', 'Z', '393', '7171', '5013', '8551', 'U', '7349', '4643', '6011', '1303', 'U', 'i', 'p', 'Z']

3733, 3713, 5613, 1, 12, 7887, 9227, 3, 21, 25, 9, 327, 25, 3, 18, 14, 4565, 3199, 6, 6183, 1861, 1451, 399, 2181, 3, 26, 393, 7171, 5013, 8551, 21, 7349, 4643, 6011, 1303, 21, 9, 16, 26