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: ['6403', 'Q', '8303', '85', '5577', '7095', 'e', '1137', 'P', 'X', 'H', 'W', '9277', '3105', 'F', '5813']

6403, 17, 8303, 85, 5577, 7095, 5, 1137, 16, 24, 8, 23, 9277, 3105, 6, 5813