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: ['e', 'E', 'R', '5485', '4683', '5625', 'e', 'g', '9607', 'g', '7589', '3015', 'T', 'Y', 'U', '4609', 'n', '3935', 'r', '8473', 'J', '1945', 'W']

5, 5, 18, 5485, 4683, 5625, 5, 7, 9607, 7, 7589, 3015, 20, 25, 21, 4609, 14, 3935, 18, 8473, 10, 1945, 23