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: ['3717', 'n', '8323', '6997', 'D', 'r', 'v', 'O', 'O', '8787', 'Z', 'W', 'v', '3595', '9465', '6073', '8755', '6575', '8893', '6799', '3765', '5291', '7243']

3717, 14, 8323, 6997, 4, 18, 22, 15, 15, 8787, 26, 23, 22, 3595, 9465, 6073, 8755, 6575, 8893, 6799, 3765, 5291, 7243