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: ['L', 'q', 'W', '7237', 'y', '6121', '1813', 'E']

12, 17, 23, 7237, 25, 6121, 1813, 5