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: ['P', 'Q', 'S', 'K', '8309', '5213', '5023', 'h', '189', '2761', '4681', 'H', 't', '3843', 'u', 'R', '4275', '1843', 'm', '1207', '5377', 'U', 'u', 'P', '3501', 'R', 'S', 'n', 'V', 'T', 'w', 'K', '9083', 'P', '9369', 'I']

16, 17, 19, 11, 8309, 5213, 5023, 8, 189, 2761, 4681, 8, 20, 3843, 21, 18, 4275, 1843, 13, 1207, 5377, 21, 21, 16, 3501, 18, 19, 14, 22, 20, 23, 11, 9083, 16, 9369, 9