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: ['8307', 'N', '9551', '8923', 'U', '8435', '9031', 'x', 'b', '2737', '3133', 'b', '2267', 'k', '3591', 'O', 'L', 'M', '8113', '2465', '611', 'i', 'o', '5029', 'x', '5713', '587', '3949', 'X', 'n', '2275', '2587', '1519', 'V']

8307, 14, 9551, 8923, 21, 8435, 9031, 24, 2, 2737, 3133, 2, 2267, 11, 3591, 15, 12, 13, 8113, 2465, 611, 9, 15, 5029, 24, 5713, 587, 3949, 24, 14, 2275, 2587, 1519, 22