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: ['a', '4023', '3085', '33', 'q', '3513', '755', 'O', '9429', '9635', '4335', '3959', 'U', '9931']

1, 4023, 3085, 33, 17, 3513, 755, 15, 9429, 9635, 4335, 3959, 21, 9931