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: ['5203', '265', '3607', '1585', 'a', 't', '6081', 'B', 'Q', '809', 'N', 'm', '2283', '7331', 'a', 'V', '3409', '2607', 'V', '5593']

5203, 265, 3607, 1585, 1, 20, 6081, 2, 17, 809, 14, 13, 2283, 7331, 1, 22, 3409, 2607, 22, 5593