Detailed Instructions: 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.
Q: ['4221', 'M', '2943', '7627', 'v', '2215', 'K', '449', 'S', '5835', 'M', 'X', '2847']
A:
4221, 13, 2943, 7627, 22, 2215, 11, 449, 19, 5835, 13, 24, 2847