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: ['6453', 'x', 'q', '9365', 'r', '1041', 'v', 's', '5891', '2367', '3813', '2737', 'M', 'B', '7861', 'p', '2611', '5135', '8895', 's', 'D', 'Q', 'q', '8515', '7773', 'O', 'r', 'f', 'n', 'Y', '3985', '8389']

6453, 24, 17, 9365, 18, 1041, 22, 19, 5891, 2367, 3813, 2737, 13, 2, 7861, 16, 2611, 5135, 8895, 19, 4, 17, 17, 8515, 7773, 15, 18, 6, 14, 25, 3985, 8389