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: ['v', '3439', 'N', 'U', '4815', 'b', 'v', 'b', 'y', 'L', 'j', '5493', 'O', 'e', 'y', '9753', 'J', 'I', 'r', '9703', '9819', 'k', 'K', '8149', '6773', '3013', '7355', 'N', '7231', '3031', '2647', 'J', 'U', '2743', '8133']

22, 3439, 14, 21, 4815, 2, 22, 2, 25, 12, 10, 5493, 15, 5, 25, 9753, 10, 9, 18, 9703, 9819, 11, 11, 8149, 6773, 3013, 7355, 14, 7231, 3031, 2647, 10, 21, 2743, 8133