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: ['x', '9419', '3451', '1631', '1237', '1399', '3171', '7997', '5459', '7973', '4039', '7941', '3567']

24, 9419, 3451, 1631, 1237, 1399, 3171, 7997, 5459, 7973, 4039, 7941, 3567