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: ['X', '519', '5727', 'e', 'C', '1213', 'b', '7739', '2479', 'u', 's', 'Q', '9589', '8119', 'Q', 'V', '4279', '6105', 'k', '3879', '9253', 'q', 'z', 'k', '3497', 'J', 'z', '4689', 'e', 'R', 'P', '3693', '3225']

24, 519, 5727, 5, 3, 1213, 2, 7739, 2479, 21, 19, 17, 9589, 8119, 17, 22, 4279, 6105, 11, 3879, 9253, 17, 26, 11, 3497, 10, 26, 4689, 5, 18, 16, 3693, 3225