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', 'p', '9919', 'H', '1533', '3671', 'e', 'o', 'n', '3553', '2699', 'D', 'O', '5675', 'N', 'i', 's', 'E', '6459', 'B', 'N', 'J', '5023', 'q', 'E', '4349', 'Q', 'Y', '5919', 'A', '7975', '9587', 'f', 'j']

23, 16, 9919, 8, 1533, 3671, 5, 15, 14, 3553, 2699, 4, 15, 5675, 14, 9, 19, 5, 6459, 2, 14, 10, 5023, 17, 5, 4349, 17, 25, 5919, 1, 7975, 9587, 6, 10