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: ['4703', '6237', '4481', '1233', '4931', '8305']

4703, 6237, 4481, 1233, 4931, 8305