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: ['4745', 'N', '5885', '9491', 'L', 'B', 'C', '9659', '1269', 'J', '7353', 'K', 'F', 'd', 'O', 'G', 'Z', 'r', 'z', 'L', 'G', 'T', 'm', 'K', 'h', '2113', '6199', 'b', '8855']

4745, 14, 5885, 9491, 12, 2, 3, 9659, 1269, 10, 7353, 11, 6, 4, 15, 7, 26, 18, 26, 12, 7, 20, 13, 11, 8, 2113, 6199, 2, 8855