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: ['4769', 'N', 'k', '405', '3239', '9395', '175', '4623', '7927', '2827', '5729', 'R', '8179', '5635']

4769, 14, 11, 405, 3239, 9395, 175, 4623, 7927, 2827, 5729, 18, 8179, 5635