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', '2021', 'D', 'E', '4757', '4447', '5483', '2541']

8813, 2021, 4, 5, 4757, 4447, 5483, 2541