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: ['8813', '259', 'k', 'a', '3547', 'c', 'i', '7777', '3305', 'e', 'z', '9289', 'M', 'M', '9939']

8813, 259, 11, 1, 3547, 3, 9, 7777, 3305, 5, 26, 9289, 13, 13, 9939