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: ['6771', '6451', 'G', 'D', '5849', '2537', '4515', '3635', 'Q']

6771, 6451, 7, 4, 5849, 2537, 4515, 3635, 17