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: ['z', '9199', '7597', 'q', 'X', 't', '9001', 'J', '3187']

26, 9199, 7597, 17, 24, 20, 9001, 10, 3187