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: ['8383', '2599', '539', '9545', 'O', 'q', 'f', 'l', 'h', '9565', 'J', 'R', '9673', '2967', 'M', '4561', 'G', 'e']

8383, 2599, 539, 9545, 15, 17, 6, 12, 8, 9565, 10, 18, 9673, 2967, 13, 4561, 7, 5