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: ['3515', '3775', '5111', '7489', 'A', '8979', 'Q', 'O', 'V', '1691', '889', '3191', 'Q', '8565', 'o', '2649', 'B', '4355', '1165', '5491', 'g', '933', '4207', 'r', 'X', 'G', 'W', '1297']

3515, 3775, 5111, 7489, 1, 8979, 17, 15, 22, 1691, 889, 3191, 17, 8565, 15, 2649, 2, 4355, 1165, 5491, 7, 933, 4207, 18, 24, 7, 23, 1297