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: ['45', 'E', '4605', 'S', '9469', '3187', '4547', '9477', '5183']

45, 5, 4605, 19, 9469, 3187, 4547, 9477, 5183