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: ['H', '3675', 'I', '1791', '2567', '9939', '8325', 'm', 'u', 'c', '9317', '4691', 'T', 'i', 'n', 'S', '289', '6621', '517', 'O', 'G', '3935', 'B', 'k', 'r', 'p', '8975', 'E', 'e']

8, 3675, 9, 1791, 2567, 9939, 8325, 13, 21, 3, 9317, 4691, 20, 9, 14, 19, 289, 6621, 517, 15, 7, 3935, 2, 11, 18, 16, 8975, 5, 5