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: ['4617', '5975', '7685', '5505', 'w', '3199', 'g', 'f', 'M', 'W', 'G']

4617, 5975, 7685, 5505, 23, 3199, 7, 6, 13, 23, 7