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: ['7559', 'o', 'l', 'N', '3025', '4423', '9293', '3643', '2631', '1045', 'k', 'F', '9317', '5275', 'G', '9559', '5751', 'o', '4777', 'j', 'f', 'r', 'b', '9937', '6341', 'K', '5659', 'i', '459', '5407', 'K', 'Z', 'G', '8251', 'f', 'z', '1055', '7477', 'e']

7559, 15, 12, 14, 3025, 4423, 9293, 3643, 2631, 1045, 11, 6, 9317, 5275, 7, 9559, 5751, 15, 4777, 10, 6, 18, 2, 9937, 6341, 11, 5659, 9, 459, 5407, 11, 26, 7, 8251, 6, 26, 1055, 7477, 5