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', '5477', '5619', 'b', '2987', 'I', 'b', 'z', '7177', '1613', 'V', 'e', '2517', '1101', 'J', 't', '7399', 'E', '2719', 'F', '5625', '2605', 'q', '35', '7909', 'X', '1597']

13, 5477, 5619, 2, 2987, 9, 2, 26, 7177, 1613, 22, 5, 2517, 1101, 10, 20, 7399, 5, 2719, 6, 5625, 2605, 17, 35, 7909, 24, 1597