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: ['573', '5089', '9239', '6033', 'E', '5447', '6281', '8607', 'h', 'b', 'k', '5523', '4473', 'H', 'h', '3629', '3583', '4965', 'I', '467', 'A', 'y', '8273', 'X', 'M', '2829', '6373', 'C', 't', 'q', 'n', 'L', 'K', 'G', 'F', '2387', 'Y', '841']

573, 5089, 9239, 6033, 5, 5447, 6281, 8607, 8, 2, 11, 5523, 4473, 8, 8, 3629, 3583, 4965, 9, 467, 1, 25, 8273, 24, 13, 2829, 6373, 3, 20, 17, 14, 12, 11, 7, 6, 2387, 25, 841