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: ['8547', '925', 'V', '1235', 'g', 'f', 'G', 'D']

8547, 925, 22, 1235, 7, 6, 7, 4