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: ['8275', 'Q', 'n', 'I', '1309', 'T', 'K', '8963']

8275, 17, 14, 9, 1309, 20, 11, 8963