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: ['8453', '7883', '1205', '949', 'P', '9565', 'u', 'V', '1847', 'F', '3415', '6495', '7803', '9127', '2491', 'l', 'i', 'e', '7785', '4109', 'X', '4119', '8511', '7557', 'z', '8275', 'B', 'd', 'E', 'A', '4451', '6857', '6765', 'l', '2529', 'g', '4297', '6983', 'J', '913']

8453, 7883, 1205, 949, 16, 9565, 21, 22, 1847, 6, 3415, 6495, 7803, 9127, 2491, 12, 9, 5, 7785, 4109, 24, 4119, 8511, 7557, 26, 8275, 2, 4, 5, 1, 4451, 6857, 6765, 12, 2529, 7, 4297, 6983, 10, 913