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: ['X', 'i', '5325', 'j', 'Q', '3691', '5607', 'n', 'O', 'X', '2011']

24, 9, 5325, 10, 17, 3691, 5607, 14, 15, 24, 2011