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: ['p', '5337', '4765', 'i', 'H', 'l', 'H', 'u', '413', 'l', '3387', '4541', '1557', '1033', '3359', '2789', '6289', 'a', '5555', '317', '4019', '4237', 'y', 'h', 'y', '9119', '3303', 'A', '5333', 'e', '3203', 'z', '6165', '6849', 'J', 'W', '5475', '4957', '8893']

16, 5337, 4765, 9, 8, 12, 8, 21, 413, 12, 3387, 4541, 1557, 1033, 3359, 2789, 6289, 1, 5555, 317, 4019, 4237, 25, 8, 25, 9119, 3303, 1, 5333, 5, 3203, 26, 6165, 6849, 10, 23, 5475, 4957, 8893