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: ['2119', 'P', 'W', 'V', 'O', '2279', '7375', 'K', '9137', 'm', 'j', '6733', '2753', 'T', 'G', 'X', '6895', '5575', 'o', 'Y', '4775', 'e', '3129', 'm', 'O', '1099', '1277', 'y', 'n', '4967', 'g', 'h', '2737', 'm', 'g', 'w', '539', 'L', 'o']

2119, 16, 23, 22, 15, 2279, 7375, 11, 9137, 13, 10, 6733, 2753, 20, 7, 24, 6895, 5575, 15, 25, 4775, 5, 3129, 13, 15, 1099, 1277, 25, 14, 4967, 7, 8, 2737, 13, 7, 23, 539, 12, 15