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: ['8097', '2259', '31', '857', '3961', 'E', '707']

8097, 2259, 31, 857, 3961, 5, 707