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: ['c', '8719', 'W', '2463', 's', 'g', '1075', 'E']

3, 8719, 23, 2463, 19, 7, 1075, 5