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: ['7527', '3405', '4529', '1325', '8297', 'r', 'J', '4605', 't', '7311', 'N', 'p', '9525', 'b', '1023', 'U', 'P']

7527, 3405, 4529, 1325, 8297, 18, 10, 4605, 20, 7311, 14, 16, 9525, 2, 1023, 21, 16