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: ['6103', 'M', '8699', '8341', '4855', '8375', '1761', '8273', 'X', 'L', 'A', 'J', 'H', 'V', 'a', 'b', 'c', '8739', 'X', 'm', '9213', '8569', '5623', '4441', 'v', '5883', '93', 'd', 'X', '6867']

6103, 13, 8699, 8341, 4855, 8375, 1761, 8273, 24, 12, 1, 10, 8, 22, 1, 2, 3, 8739, 24, 13, 9213, 8569, 5623, 4441, 22, 5883, 93, 4, 24, 6867