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: ['9765', '8675', '3903', '9681', '2605', 'o', '207', '3413', 'f', 'p', 'X', 't', 'O', 'u', '4299', '2481', 'g', '3739', '1997', 'C', 'g', '7523', '6973', '3311', 'c', '1087', '8737', 'g', 't', '2723', 'p', 'q', '3761', 'e', '3723', 'z', '35', 'G']

9765, 8675, 3903, 9681, 2605, 15, 207, 3413, 6, 16, 24, 20, 15, 21, 4299, 2481, 7, 3739, 1997, 3, 7, 7523, 6973, 3311, 3, 1087, 8737, 7, 20, 2723, 16, 17, 3761, 5, 3723, 26, 35, 7