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: ['4227', 'P', 'W', '7875', '1203', '2101', '3079', '3847', 's', 'M', 'X', 'S', 'u', '2727', 'J', 'I', '9941', '4029', '6771', 'n', 'k', '2221', '2959', 'I', 'd', '1055', 'S', '3841', 'C', '6363', '5391', 'b', '8149', '827']

4227, 16, 23, 7875, 1203, 2101, 3079, 3847, 19, 13, 24, 19, 21, 2727, 10, 9, 9941, 4029, 6771, 14, 11, 2221, 2959, 9, 4, 1055, 19, 3841, 3, 6363, 5391, 2, 8149, 827