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: ['3885', '5431', 'Y', '2393', '8217', 'M', '5115', '1687', '9503', 'h', '4567', '2543', 'a', 'F', 'r', 'K', 'p', '4031', 's', 'O', '2409', 'Z', 'c', '7197', 'Y', 'U', '7109', '9775', '39', 'e', 'D', 'z']

3885, 5431, 25, 2393, 8217, 13, 5115, 1687, 9503, 8, 4567, 2543, 1, 6, 18, 11, 16, 4031, 19, 15, 2409, 26, 3, 7197, 25, 21, 7109, 9775, 39, 5, 4, 26