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', '9255', 'W', 'o', 'y', 'L', 'l', 'a']

24, 9255, 23, 15, 25, 12, 12, 1