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: ['89', '5959', '6219', 'd', 'W', '3919', 'X', '3807', '7841', '171', '5985', '9725', 'U', '1853', 'Q', 'U', 'F', 'o', '3677', 'U', '7451', '6769', 'l', 'E', 'B', '5375', 'k', 'F', 'A', '5713', 'A']

89, 5959, 6219, 4, 23, 3919, 24, 3807, 7841, 171, 5985, 9725, 21, 1853, 17, 21, 6, 15, 3677, 21, 7451, 6769, 12, 5, 2, 5375, 11, 6, 1, 5713, 1