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: ['4357', 'V', 'C', '5751', 'V', '2591', 'F', '6053', 'm', 'E', '5933', 'z', '1643', 'v', 'j', '9719', '4589', '2079', 'l', 'M', 'l', 'q', '8355', 'G', 'z', 'l', 'j', 'b', 'a', '4785', '9075', '5631', 'h', 'C', '3389', 'Y', '1007', '9047', '2133', '3095']

4357, 22, 3, 5751, 22, 2591, 6, 6053, 13, 5, 5933, 26, 1643, 22, 10, 9719, 4589, 2079, 12, 13, 12, 17, 8355, 7, 26, 12, 10, 2, 1, 4785, 9075, 5631, 8, 3, 3389, 25, 1007, 9047, 2133, 3095