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: ['8237', 'R', 'q', '7083', 'U', 'e', 'N', 'g', '323', 'O', 'Q', 'H', 'N', '7609', '4509', 'g']

8237, 18, 17, 7083, 21, 5, 14, 7, 323, 15, 17, 8, 14, 7609, 4509, 7