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: ['2375', '5073', 'T', 'd', 'i', '3681', 'k', 's', '8513', 'N', '5143', 'r', '9799', 'a', 'i', 'F', 'E', '2845', '2291', 'x', 'Z', '4671', 'B', 'L', 'u', '9229', '9273', '9673', 'A', '7419', '2243', '4575', '8871', '4195', '2475', '6327', 'n', 'f']

2375, 5073, 20, 4, 9, 3681, 11, 19, 8513, 14, 5143, 18, 9799, 1, 9, 6, 5, 2845, 2291, 24, 26, 4671, 2, 12, 21, 9229, 9273, 9673, 1, 7419, 2243, 4575, 8871, 4195, 2475, 6327, 14, 6