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: ['d', '3883', 'I', 'F', '6891', 'G', 'c', '9833', 'F', '3731', 'a', '5267', '5617', '6639', '2861', '7319', '451', 'i', 't', 'k', 'B', '5613', 'T', 'A', 'S', '2435', '5807', '9405', '3453', '1829', 'R', '869', 'X', 'h', '1097', 'B', '3369', 't', 'B']

4, 3883, 9, 6, 6891, 7, 3, 9833, 6, 3731, 1, 5267, 5617, 6639, 2861, 7319, 451, 9, 20, 11, 2, 5613, 20, 1, 19, 2435, 5807, 9405, 3453, 1829, 18, 869, 24, 8, 1097, 2, 3369, 20, 2