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: ['8847', 'X', 'y', '9169', 'F', '4081', '2249', '6057', 'E', 'N', '9949', '9543', 't', '6609', 'u', 'E', 'a']

8847, 24, 25, 9169, 6, 4081, 2249, 6057, 5, 14, 9949, 9543, 20, 6609, 21, 5, 1