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: ['3027', '241', 'K', 'N', 'k', '8003', '945', '149', '1467', 'c', 'T', 'l', '8121', '7657', 'A', 'u', '653', '6939', 'X', 'U', 'n', '9813', 'y', 'Y', '7945', 'a']

3027, 241, 11, 14, 11, 8003, 945, 149, 1467, 3, 20, 12, 8121, 7657, 1, 21, 653, 6939, 24, 21, 14, 9813, 25, 25, 7945, 1