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: ['9757', 'S', '8075', 'X', 'q', 'b', '2695', 'F', 'z', 'Y', '9465', 'u', '8745', 'M', 'a', 'r', 'I', 'Z', '2395', '8713', '5809', 'Y', '6547', '5159', '1509', '7621', 'y', 'E', '1685', '4023', 'J']

9757, 19, 8075, 24, 17, 2, 2695, 6, 26, 25, 9465, 21, 8745, 13, 1, 18, 9, 26, 2395, 8713, 5809, 25, 6547, 5159, 1509, 7621, 25, 5, 1685, 4023, 10