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: ['9869', '8413', 'g', '3133', '6299', '1195', '4619', 'q', '3075', 'I', '8587', 'O', 'E', '4579', '3497', '9861', 'n', 'E', 'O', '3615', 'D', 'V', 'J', '8123', 'B', 'j', 'X', '9439']

9869, 8413, 7, 3133, 6299, 1195, 4619, 17, 3075, 9, 8587, 15, 5, 4579, 3497, 9861, 14, 5, 15, 3615, 4, 22, 10, 8123, 2, 10, 24, 9439