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: ['w', '3315', '5', '9673', 'M', 'G', 'U', 'L', '6627', '8553']

23, 3315, 5, 9673, 13, 7, 21, 12, 6627, 8553