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: ['643', 'w', '7381', '9831', '3707', '4875', 'v', 'J', '9811', 'A', 'u', '6025', 'l', '6603', '7527', 'S', '2919', 'I', 'F', '3225', '2563', 'Q', '1159', 'X', 'K', 'Y', '4551', '5391', '2853', '823', '6399', 'M', 'M', 'S', '9833']

643, 23, 7381, 9831, 3707, 4875, 22, 10, 9811, 1, 21, 6025, 12, 6603, 7527, 19, 2919, 9, 6, 3225, 2563, 17, 1159, 24, 11, 25, 4551, 5391, 2853, 823, 6399, 13, 13, 19, 9833