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: ['8459', 'O', 'a', '6065', '2337', '6235', '901', '5281', '3695', 'i', 'p', '9493', 'e', 'j']

8459, 15, 1, 6065, 2337, 6235, 901, 5281, 3695, 9, 16, 9493, 5, 10