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: ['H', '2405', 'V', '7157', '8229', 'i', 'u', '8123', '1773', '6375', '167', '3659']

8, 2405, 22, 7157, 8229, 9, 21, 8123, 1773, 6375, 167, 3659