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: ['c', 'X', 's', 'f', 'K', '4593', 'V', 'M', 'n', '255', 'Y', 'e', '47', 'd', 'n', 'O', 'N', 'i', 'e', 'P', '3685', 'N', 'o', '3331', 'Y', '3689', '4807', '3737', '3163', '7659', '7547', 'O', 'P', '5399', '1913', '451', '7375', '7569']

3, 24, 19, 6, 11, 4593, 22, 13, 14, 255, 25, 5, 47, 4, 14, 15, 14, 9, 5, 16, 3685, 14, 15, 3331, 25, 3689, 4807, 3737, 3163, 7659, 7547, 15, 16, 5399, 1913, 451, 7375, 7569