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: ['J', 'd', 'a', '6607', 'w', 'q', 's', '3273', '1569']

10, 4, 1, 6607, 23, 17, 19, 3273, 1569