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: ['B', '435', '8133', 'R', '857', '205', '2061', '7237', '1939', 'G', 'i', '9485', 't', '673', 'w', 'b', 'O', '6607', '9389', 'p', 'K', 'Y', 'K', '3671', 'k', '6309', '1995', '7793', 'D', '9011', '1245', '8443', '7923']

2, 435, 8133, 18, 857, 205, 2061, 7237, 1939, 7, 9, 9485, 20, 673, 23, 2, 15, 6607, 9389, 16, 11, 25, 11, 3671, 11, 6309, 1995, 7793, 4, 9011, 1245, 8443, 7923