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: ['8235', 'o', 'g', '885', 'y', 'Y', '1357', 'T', '9707', 'C', '1413', '3209', '3945', '2565', 'a', '1587', 'x', 'F', '2387']

8235, 15, 7, 885, 25, 25, 1357, 20, 9707, 3, 1413, 3209, 3945, 2565, 1, 1587, 24, 6, 2387