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: ['3345', '6477', 'H', '4143', 'E', 'g', '1607', '1405', '4485', '207', '3191', '2335', '6759', 'Z', '2385', '9181', 'I', '3283', '8735']

3345, 6477, 8, 4143, 5, 7, 1607, 1405, 4485, 207, 3191, 2335, 6759, 26, 2385, 9181, 9, 3283, 8735