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: ['m', 'L', '3545', 'O', '4713', 'c', '8101', 'q', 'W', '1943', '9877', 's', 'h', '8761', 'l', '6265', 'q', '7239', '5423', 'o', '4827', '7777', '9771', 'X', 'f']

13, 12, 3545, 15, 4713, 3, 8101, 17, 23, 1943, 9877, 19, 8, 8761, 12, 6265, 17, 7239, 5423, 15, 4827, 7777, 9771, 24, 6