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: ['6825', '8357', 'h', '5945', '6731', '635', 'C', 'y', '7199', 'D', '6445', 't', 'z', 'I', '9615', 'Y', 'Q', 'j', 'd', '1949', '9985', '899', '7375', 'r', 'Q', '5991', 'M', '315', '6341', 'm', 'j', 'z', '2469', 'b', 'u', 'K', '6593']

6825, 8357, 8, 5945, 6731, 635, 3, 25, 7199, 4, 6445, 20, 26, 9, 9615, 25, 17, 10, 4, 1949, 9985, 899, 7375, 18, 17, 5991, 13, 315, 6341, 13, 10, 26, 2469, 2, 21, 11, 6593