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: ['3329', 'L', 'u', '3657', 'e', '5631', '1193', '939', 'U', 'd', '3719']

3329, 12, 21, 3657, 5, 5631, 1193, 939, 21, 4, 3719