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: ['9001', 'i', 'G', '3461', 'V', '1237', '2043', '1723', '8503', '1655', 'T', 'M', '1379', '8537', 'C', 'M', '1869', '6367', 'P', '6005', 'z', '4503', '4139', '3395', '3583']

9001, 9, 7, 3461, 22, 1237, 2043, 1723, 8503, 1655, 20, 13, 1379, 8537, 3, 13, 1869, 6367, 16, 6005, 26, 4503, 4139, 3395, 3583