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: ['9281', '2649', '6383', '6235', 'B', '5861', '6975', '7843', 'p', 'Y', 'r', 'D', 'G', '3575', 'm', '9539', 'w', 'l', '8267', 'm', '4967', 'D', '9845', 'L', 'S', 'V', '5435', 'o', 'p', 'n']

9281, 2649, 6383, 6235, 2, 5861, 6975, 7843, 16, 25, 18, 4, 7, 3575, 13, 9539, 23, 12, 8267, 13, 4967, 4, 9845, 12, 19, 22, 5435, 15, 16, 14