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: ['5595', 'J', 'o', '8547', 'O', 'O', 'E', 'o', '589', '8733']

5595, 10, 15, 8547, 15, 15, 5, 15, 589, 8733