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: ['8939', 'a', 'C', '611', '8015', 'i', '4581', '4797', 'z', 'J', 'z', 'V', '8753', '5529', 'v', '2885', 'b', 'O', 's', 'v', '6695', '3847', 'R', '6265', '1499', 'Q', 'L', 'v', 'F', '3869', '3135', '1779', '4697', '1845', '1795', '6729', '9227', 'Y', '8731']

8939, 1, 3, 611, 8015, 9, 4581, 4797, 26, 10, 26, 22, 8753, 5529, 22, 2885, 2, 15, 19, 22, 6695, 3847, 18, 6265, 1499, 17, 12, 22, 6, 3869, 3135, 1779, 4697, 1845, 1795, 6729, 9227, 25, 8731