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: ['W', '515', '8057', '2663', 'C', '4233', 'j', 'M', 'r', '919', '113', '951', 'O', 'a', 'J', 'V', 'Q', '4543', '2497', '4241', '471', '6523', '7809', 'o', 'A', '4049', 'H', '3491', '589', '7963', 'e', '5319']

23, 515, 8057, 2663, 3, 4233, 10, 13, 18, 919, 113, 951, 15, 1, 10, 22, 17, 4543, 2497, 4241, 471, 6523, 7809, 15, 1, 4049, 8, 3491, 589, 7963, 5, 5319