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: ['2573', '1717', '3839', '5949', '6249', 'x', '4995', 'Y', 'L', 'W', '7635', 'u', 'U', 'P', 'O', '6795', '2527', '2441', 'D', 'W', '8759', 'p', 'q']

2573, 1717, 3839, 5949, 6249, 24, 4995, 25, 12, 23, 7635, 21, 21, 16, 15, 6795, 2527, 2441, 4, 23, 8759, 16, 17