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: ['841', 'Z', 'Z', 'Y', '8075', 'n', '7963', '6873', 'K', 'F', 'J', '9425', 'O', '1403', '9279', '4675', 'i', '9879', 'K', 'D', 'p']

841, 26, 26, 25, 8075, 14, 7963, 6873, 11, 6, 10, 9425, 15, 1403, 9279, 4675, 9, 9879, 11, 4, 16