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: ['7023', '9805', 'T', 'N', 'D', '4193', '6341', 'a', '8807', 'N']

7023, 9805, 20, 14, 4, 4193, 6341, 1, 8807, 14