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: ['f', 'a', 'Z', 'l', '6089', '2995', 'k', '6207', '4363', 'M', '6203', '3649', 's', 'T', '5547', '5399', 'U', 'f', '7639', '9179', 'Q', 'Y', 'X', 'x', 'o', '2835', 'l', 'o', '3495']

6, 1, 26, 12, 6089, 2995, 11, 6207, 4363, 13, 6203, 3649, 19, 20, 5547, 5399, 21, 6, 7639, 9179, 17, 25, 24, 24, 15, 2835, 12, 15, 3495