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: ['179', 'f', '7909', '9959', '3649', 'B', 'k', 'I', 's', 'Y', 'a', '6619', '3657', 'G', 'Q', '3647']

179, 6, 7909, 9959, 3649, 2, 11, 9, 19, 25, 1, 6619, 3657, 7, 17, 3647