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: ['7581', '6853', '2489', 'Q', '1081', 'm', '4177', '7675', 'a', 'N', 'O', '295', 'Z', 'B', 'q', '5067', 'L', '9281']

7581, 6853, 2489, 17, 1081, 13, 4177, 7675, 1, 14, 15, 295, 26, 2, 17, 5067, 12, 9281