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: ['4093', 'b', '7383', '6191', '3039', '2897', 'U', 'V', '8229', 'W', '5775', '2715', 'l', '2971', '6323', '5127', '2249', 'r', 'A', '3055', 'C', 'P', 'v', '5509', '6433', 'w']

4093, 2, 7383, 6191, 3039, 2897, 21, 22, 8229, 23, 5775, 2715, 12, 2971, 6323, 5127, 2249, 18, 1, 3055, 3, 16, 22, 5509, 6433, 23