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: ['V', '6923', 'F', 'i', '5903', '4991', 'O', 'E', '9195', '8571', 'Q', 'a']

22, 6923, 6, 9, 5903, 4991, 15, 5, 9195, 8571, 17, 1