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: ['V', '4147', '6997', '5695', 'A', 'B', 's', 'A', '6277', 'P', '7471', '2317', 'K', 'N', 'G', '211', '961', 'n', 'l', '8339', 'R', 'a', 'M', 'k', '4369', 't', 'n', 'q', 'J', '2399', 'r', 'r', '3515', 'U', '5299', '3645', 'I']

22, 4147, 6997, 5695, 1, 2, 19, 1, 6277, 16, 7471, 2317, 11, 14, 7, 211, 961, 14, 12, 8339, 18, 1, 13, 11, 4369, 20, 14, 17, 10, 2399, 18, 18, 3515, 21, 5299, 3645, 9