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: ['N', '9921', 'D', '1013', 'c', 'g', 'a', 'v', '5229', 'Q', '2373', 'w', '3861', 'a', 'Q', 'h', '1239', 'E', 'N', '8251', 'm', 'R', 'b', 'G', 'x', 'T', '2309', 'j', 'N', '8563', '1841', '7703', '6929', '1001', '2713', '3331', '5465', '9415']

14, 9921, 4, 1013, 3, 7, 1, 22, 5229, 17, 2373, 23, 3861, 1, 17, 8, 1239, 5, 14, 8251, 13, 18, 2, 7, 24, 20, 2309, 10, 14, 8563, 1841, 7703, 6929, 1001, 2713, 3331, 5465, 9415