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: ['d', '2365', 'j', 'O', 'Z', '4593', '2409', 'A', '6753', 'D', 'T', '2185']

4, 2365, 10, 15, 26, 4593, 2409, 1, 6753, 4, 20, 2185