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: ['8967', 'r', '5991', 'e', 'q', 'W', 'a', '4675', 'W', 'D', '2289', '2091', 'u', '1725', '5971', '3843', 'I', '625', 'a']

8967, 18, 5991, 5, 17, 23, 1, 4675, 23, 4, 2289, 2091, 21, 1725, 5971, 3843, 9, 625, 1