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: ['4579', '1707', '5367', '2109', 'c', '5791', '1727', '7011', 'x', 'S', 'i', '1491', 'M', '7159', '2119', 'M', '3531', 'q', 'y', '9627', '9609', '1311', '1717', 'y', '2185', 'A', 'L', 'f', 'm', 't', '6621', '8287', '4823']

4579, 1707, 5367, 2109, 3, 5791, 1727, 7011, 24, 19, 9, 1491, 13, 7159, 2119, 13, 3531, 17, 25, 9627, 9609, 1311, 1717, 25, 2185, 1, 12, 6, 13, 20, 6621, 8287, 4823