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: ['l', '7559', '4967', 'o', 'f', 'x', 'L', '8301', 'E', 'd', 'w', 'k', 'k', '1917', '3769', '5525', 'g', '2551', 'e', '2135', 'X', '4695', '6197', 'e', 'v']

12, 7559, 4967, 15, 6, 24, 12, 8301, 5, 4, 23, 11, 11, 1917, 3769, 5525, 7, 2551, 5, 2135, 24, 4695, 6197, 5, 22