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: ['3225', '8517', 'i', '5491', 'Z', '2835', '1157', 'C', '8497', '1401', 'f', 'R', 'Z', '1243', '1163', '2477', '7585', '1001', 'N']

3225, 8517, 9, 5491, 26, 2835, 1157, 3, 8497, 1401, 6, 18, 26, 1243, 1163, 2477, 7585, 1001, 14