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: ['2747', 'x', 'X', '2451', 's', 'x', 'p', '9549', 'y', 'Q', 'V', 'S', '5187', '1121', '4525', '5737', '5605', 'u', 'I', '8457', 'j', '5199', '2505', 'b', '9905', 'N', '1421', '693', '2641', 'c', '3623', 'X', 'E', '7905']

2747, 24, 24, 2451, 19, 24, 16, 9549, 25, 17, 22, 19, 5187, 1121, 4525, 5737, 5605, 21, 9, 8457, 10, 5199, 2505, 2, 9905, 14, 1421, 693, 2641, 3, 3623, 24, 5, 7905