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: ['a', 'A', '5395', 'm', 'b', 'w', '5737', 'G', '7527', '8599', 'O', '4897', '589', 'd', 'S', 'I', 'w', 'd', '851']

1, 1, 5395, 13, 2, 23, 5737, 7, 7527, 8599, 15, 4897, 589, 4, 19, 9, 23, 4, 851