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: ['5289', 'F', 'k', 'Y', '4255', '5957', 'e', '301', 'O', 'K', 'W', '7253', '5537', 'y', 'J', '5475', '4401', 'J', 'g', 'm', '781', '6297', '9559', '3135', '3397', 'b', 'y', '479', 'j', 'w', '4899', '2533', '1197', '5705', '4927']

5289, 6, 11, 25, 4255, 5957, 5, 301, 15, 11, 23, 7253, 5537, 25, 10, 5475, 4401, 10, 7, 13, 781, 6297, 9559, 3135, 3397, 2, 25, 479, 10, 23, 4899, 2533, 1197, 5705, 4927