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: ['8519', '8547', '8035', '1313', '1889', 'E', '9725', '5017', '2489', 'P', 's', 'r', '1821', 'N', 'q', 'u', '9665', '5029', 'S', '7405', '5121', 'x', 'b', 'j', 'v', 'T', '2199', 'm', '2313', 'z', '6923', 'S', 'T', 'h', '7687', '9431', 'U', '7641', 'e']

8519, 8547, 8035, 1313, 1889, 5, 9725, 5017, 2489, 16, 19, 18, 1821, 14, 17, 21, 9665, 5029, 19, 7405, 5121, 24, 2, 10, 22, 20, 2199, 13, 2313, 26, 6923, 19, 20, 8, 7687, 9431, 21, 7641, 5