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: ['f', '6283', '1181', '8361', 'd', '2203', 'G', 'F', 'I', 'O', '3483', '3151', 'M', 's', 'Y', '8561', 'a', 'z', '8657', 'H', 'N']

6, 6283, 1181, 8361, 4, 2203, 7, 6, 9, 15, 3483, 3151, 13, 19, 25, 8561, 1, 26, 8657, 8, 14