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: ['8477', '551', '1177', 'Y', 'e', 'n', '4451', '707', 'n', 's', '2659', 'N', 'm', '2435', 'x', 'g', 'R', 'G']

8477, 551, 1177, 25, 5, 14, 4451, 707, 14, 19, 2659, 14, 13, 2435, 24, 7, 18, 7