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: ['6101', 'N', 'C', '5649', 'C', 'P', 'g', '3793', '8557', 'f', 'a', 'T', '1933', '615', '857', 'u', '8021', 'V', '619', '2723', '8641', 'g', '4029', 'I', '3165', 'c', '2751']

6101, 14, 3, 5649, 3, 16, 7, 3793, 8557, 6, 1, 20, 1933, 615, 857, 21, 8021, 22, 619, 2723, 8641, 7, 4029, 9, 3165, 3, 2751