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: ['W', 'I', 'q', '8823', 'L', '3377', '5945', '8237', 'j', '5519', '1707', '7015']

23, 9, 17, 8823, 12, 3377, 5945, 8237, 10, 5519, 1707, 7015