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: ['4295', 'x', 'V', 'e', 'q', '7849', '1565', 'y', '2563', 'G', '1915', 'L', '8503', '1045', '7667', '5553', 'A', '2343']

4295, 24, 22, 5, 17, 7849, 1565, 25, 2563, 7, 1915, 12, 8503, 1045, 7667, 5553, 1, 2343