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: ['9545', 'N', '2987', 'J', 'E', '1179', 'O', 'a', '3665', '2825', 'X', 'h', 'a', '7143']

9545, 14, 2987, 10, 5, 1179, 15, 1, 3665, 2825, 24, 8, 1, 7143