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: ['z', '9305', '3861', '7585', 'e', 'u', 'F', 'B', '6051', 'i', '9201', '1067', 'k', '9445', 'm', 'O', 'Z', 'b', '5513', 'U', '2237', 'u', 'G', '5557', '5769', '451', '1797']

26, 9305, 3861, 7585, 5, 21, 6, 2, 6051, 9, 9201, 1067, 11, 9445, 13, 15, 26, 2, 5513, 21, 2237, 21, 7, 5557, 5769, 451, 1797