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: ['3183', 'U', 'x', 'N', '2779', 'M', '315', '6085', '6255', 'm', '4013', 'U', '5941', 's', 'y', '3157', '3093', '7589', 'T', '5243', '9819', '8977', 'w', '3887', '5827', '1723', '2561', 'E', 'Q', 'g', 'A', '6899', 'Q', '3207', '2047', '3545']

3183, 21, 24, 14, 2779, 13, 315, 6085, 6255, 13, 4013, 21, 5941, 19, 25, 3157, 3093, 7589, 20, 5243, 9819, 8977, 23, 3887, 5827, 1723, 2561, 5, 17, 7, 1, 6899, 17, 3207, 2047, 3545