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: ['9757', '1353', 'L', '5013', 'b', '7399', '9813', 'f', '8911', '6545', '5845', '1561', '1457', 'G', 'e', 'a', 'E', '67', '317', 'U', 'f', 'n', 'q', 'v', 'K', 'Y', 'E', '5901', 'B', 'D', 'q', 'J']

9757, 1353, 12, 5013, 2, 7399, 9813, 6, 8911, 6545, 5845, 1561, 1457, 7, 5, 1, 5, 67, 317, 21, 6, 14, 17, 22, 11, 25, 5, 5901, 2, 4, 17, 10