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: ['2935', '6089', '7797', 'R', '9981', '9325', 'o', 'X', 'o', '3815', '6491', 'n', '2777', '8641', '1141', 'w', '9839', '3251', '1625', '5821', 'd', '5115', 'Y', 'N', '9247', '8031', '4693', 'D']

2935, 6089, 7797, 18, 9981, 9325, 15, 24, 15, 3815, 6491, 14, 2777, 8641, 1141, 23, 9839, 3251, 1625, 5821, 4, 5115, 25, 14, 9247, 8031, 4693, 4