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: ['4973', 'M', '9109', '1045', '347', 'B', '9041', '8585']

4973, 13, 9109, 1045, 347, 2, 9041, 8585