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: ['e', '7455', '4517', 'i', '4185', '4631', 'K', 'C', 'h', '2905', 'l', 'U', 's', 'h', 'y', 'd', '6623', 'D', '9975', '287', '3731', 'm', '7387', '6927', 'u', 'J', '4499', 'I', '8461', 'T', 'T', '9443', 'P', '4297', 'F', 'F', '3867', '5383', 'O', '5341']

5, 7455, 4517, 9, 4185, 4631, 11, 3, 8, 2905, 12, 21, 19, 8, 25, 4, 6623, 4, 9975, 287, 3731, 13, 7387, 6927, 21, 10, 4499, 9, 8461, 20, 20, 9443, 16, 4297, 6, 6, 3867, 5383, 15, 5341