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: ['6193', '1075', '2845', '8989', '5731', 'N']

6193, 1075, 2845, 8989, 5731, 14