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: ['9651', '7473', 'v', 'n', '3971', '8455', 'Q', 's', 'W', '4669', '741', '8957', 'I', '1365', '2793', 'Z', '9673', 'B', 'Y', '7881', 'u', 'T', '2239']

9651, 7473, 22, 14, 3971, 8455, 17, 19, 23, 4669, 741, 8957, 9, 1365, 2793, 26, 9673, 2, 25, 7881, 21, 20, 2239